The 1956 United States House of Representatives elections was an election for the United States House of Representatives to elect members to serve in the 85th United States Congress. They were held for the most part on November 6, 1956, while Maine held theirs on September 10. They coincided with the re-election of President Dwight D. Eisenhower.
With no major national issues and the economic upswing of the 1950s in full force, voters generally chose to uphold the status quo, keeping the Republican president and the Democratic Congress.
Overall results
410 incumbent members sought reelection, but 6 were defeated in primaries and 15 defeated in the general election for a total of 389 incumbents winning.
{| style="width:70%; text-align:center;"
|+ ↓
|- style="color:white;"
| style="background:blue; width:53.79%;" | 234
| style="background:red; width:46.21%;" | 201
|-
| <span style="color:blue;">Democratic</span>
| <span style="color:red;">Republican</span>
|}
{| class=wikitable style="text-align:center"
! colspan=2 | Party
! Seats
! Change
! Seat percentage
! Vote percentage
! Popular Vote
|-
|
| Democratic
| 234
| 2
| 53.8%
| 51.2%
| 30,062,042
|-
|
| Republican
| 201
| 2
| 46.2%
| 48.7%
| 28,698,083
|-
|
| Liberal
| 0
|
| 0.0%
| 0.1%
| 68,130
|-
|
| Independent
| 0
|
| 0.0%
| <0.1%
| 15,848
|-
|
| Prohibition
| 0
|
| 0.0%
| <0.1%
| 12,298
|-
|
| Independent Teacher Veteran
| 0
|
| 0.0%
| <0.1%
| 5,468
|-
|
| Independent Veteran
| 0
|
| 0.0%
| <0.1%
| 4,155
|-
|
| Conservative
| 0
|
| 0.0%
| <0.1%
| 4,066
|-
|
| Constitution
| 0
|
| 0.0%
| <0.1%
| 3,619
|-
|
| Decency in Government
| 0
|
| 0.0%
| <0.1%
| 2,459
|-
|
| Progress Through Freedom
| 0
|
| 0.0%
| <0.1%
| 2,246
|-
|
| Socialist Labor
| 0
|
| 0.0%
| <0.1%
| 2,217
|-
|
| Socialist
| 0
|
| 0.0%
| <0.1%
| 1,743
|-
|
| Free Honest Elections
| 0
|
| 0.0%
| <0.1%
| 466
|-
|
| Socialist Workers
| 0
|
| 0.0%
| <0.1%
| 303
|-
|
| Social Democratic
| 0
|
| 0.0%
| <0.1%
| 260
|-
|
| American Third
| 0
|
| 0.0%
| <0.1%
| 146
|-
|
| Others
| 0
|
| 0.0%
| <0.1%
| 2,194
|-
! colspan=2 | Totals
! 435
!
! 100.0%
! 100.0%
! 58,885,743
|-
|align="left" colspan=9|Source: Election Statistics - Office of the Clerk
|}
{|
|- valign=top
| [[File:85 us house membership.png|thumb|400px|
{|
! colspan=2 | House seats by party holding plurality in state
|-
|
|
|-
|
|
|-
|
|
|}]]
| [[File:85 us house changes.png|thumb|400px|
{|
|
|
|-
|
|
|-
|
|
|-
| colspan=2 align=center |
|}]]
|}
Special elections
In these special elections, the winner was seated during 1956 or before January 3, 1957; ordered by election date.
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Member
! Party
! First elected
|-
!
| Vera D. Buchanan
| | Democratic
| 1950
| | Incumbent died November 26, 1955.<br/>New member elected January 24, 1956.<br/>Democratic hold.
| nowrap |
|-
!
| Sidney A. Fine
| | Democratic
| 1950
| | Incumbent resigned January 2, 1956.<br/>New member elected February 7, 1956.<br/>Democratic hold.
| nowrap |
|-
!
| William T. Granahan
| | Democratic
| 1944<br/>1946 <br/>1948
| | Incumbent died May 25, 1956.<br/>New member elected November 6, 1956.<br/>Democratic hold.
| nowrap |
|}
Alabama
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Frank W. Boykin
| | Democratic
| 1935
| Incumbent re-elected.
| nowrap |
|-
!
| George M. Grant
| | Democratic
| 1938
| Incumbent re-elected.
| nowrap |
|-
!
| George W. Andrews
| | Democratic
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| Kenneth A. Roberts
| | Democratic
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Albert Rains
| | Democratic
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| Armistead I. Selden Jr.
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Carl Elliott
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Robert E. Jones Jr.
| | Democratic
| 1947
| Incumbent re-elected.
| nowrap |
|-
!
| George Huddleston Jr.
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|}
Arizona
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| John Jacob Rhodes
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Stewart Udall
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|}
Arkansas
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Ezekiel C. Gathings
| | Democratic
| 1938
| Incumbent re-elected.
| nowrap |
|-
!
| Wilbur Mills
| | Democratic
| 1938
| Incumbent re-elected.
| nowrap |
|-
!
| James William Trimble
| | Democratic
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| Oren Harris
| | Democratic
| 1940
| Incumbent re-elected.
| nowrap |
|-
!
| Brooks Hays
| | Democratic
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| William F. Norrell
| | Democratic
| 1938
| Incumbent re-elected.
| nowrap |
|}
California
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Hubert B. Scudder
| | Republican
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Clair Engle
| | Democratic
| 1943
| Incumbent re-elected.
| nowrap |
|-
!
| John E. Moss
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| William S. Mailliard
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| John F. Shelley
| | Democratic
| 1949
| Incumbent re-elected.
| nowrap |
|-
!
| John F. Baldwin Jr.
| | Republican
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| John J. Allen Jr.
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| George P. Miller
| | Democratic
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| J. Arthur Younger
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Charles Gubser
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| J. Leroy Johnson
| | Republican
| 1942
| | Incumbent lost re-election.<br/>New member elected.<br/>Democratic gain.
| nowrap |
|-
!
| B. F. Sisk
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Charles M. Teague
| | Republican
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Harlan Hagen
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Gordon L. McDonough
| | Republican
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| Donald L. Jackson
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Cecil R. King
| | Democratic
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Craig Hosmer
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Chet Holifield
| | Democratic
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| colspan=3 | Vacant
| | John Carl Hinshaw (R) died August 5, 1956.<br/>New member elected.<br/>Republican hold.
| nowrap |
|-
!
| Edgar W. Hiestand
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Joseph F. Holt
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Clyde Doyle
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Glenard P. Lipscomb
| | Republican
| 1953
| Incumbent re-elected.
| nowrap |
|-
!
| Patrick J. Hillings
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| James Roosevelt
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Harry R. Sheppard
| | Democratic
| 1936
| Incumbent re-elected.
| nowrap |
|-
!
| James B. Utt
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| John Phillips
| | Republican
| 1942
| | Incumbent retired.<br/>New member elected.<br/>Democratic gain.
| nowrap |
|-
!
| Bob Wilson
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|}
Colorado
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Byron G. Rogers
| | Democratic
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| William S. Hill
| | Republican
| 1940
| Incumbent re-elected.
| nowrap |
|-
!
| John Chenoweth
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Wayne N. Aspinall
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|}
Connecticut
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Thomas J. Dodd
| | Democratic
| 1952
| | Retired to run for U. S. Senate.<br/>Republican gain.
| nowrap |
|-
!
| Horace Seely-Brown Jr.
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Albert W. Cretella
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Albert P. Morano
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| James T. Patterson
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Antoni Sadlak
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|}
Delaware
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Harris McDowell
| | Democratic
| 1954
| | Incumbent lost re-election.<br/>Republican gain.
| nowrap |
|}
Florida
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| William C. Cramer
| | Republican
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Charles E. Bennett
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Bob Sikes
| | Democratic
| 1940<br/>1944 <br/>1974
| Incumbent re-elected.
| nowrap |
|-
!
| Dante Fascell
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Syd Herlong
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Paul Rogers
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| James A. Haley
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Donald Ray Matthews
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|}
Georgia
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Prince Hulon Preston Jr.
| | Democratic
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| J. L. Pilcher
| | Democratic
| 1953
| Incumbent re-elected.
| nowrap |
|-
!
| Tic Forrester
| | Democratic
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| John Flynt
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| James C. Davis
| | Democratic
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Carl Vinson
| | Democratic
| 1914
| Incumbent re-elected.
| nowrap |
|-
!
| Henderson Lovelace Lanham
| | Democratic
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Iris Faircloth Blitch
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Phillip M. Landrum
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Paul Brown
| | Democratic
| 1933
| Incumbent re-elected.
| nowrap |
|}
Idaho
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Gracie Pfost
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Hamer H. Budge
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|}
Illinois
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| William L. Dawson
| | Democratic
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Barratt O'Hara
| | Democratic
| 1948<br/>1950 <br/>1952
| Incumbent re-elected.
| nowrap |
|-
!
| James C. Murray
| | Democratic
| 1954
| | Incumbent lost re-election.<br/>Republican gain.
| nowrap |
|-
!
| William E. McVey
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| John C. Kluczynski
| | Democratic
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Thomas J. O'Brien
| | Democratic
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| James Bowler
| | Democratic
| 1953
| Incumbent re-elected.
| nowrap |
|-
!
| Thomas S. Gordon
| | Democratic
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Sidney R. Yates
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Richard W. Hoffman
| | Republican
| 1948
| | Incumbent retired.<br/>Republican hold.
| nowrap |
|-
!
| Timothy P. Sheehan
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Charles A. Boyle
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Marguerite S. Church
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| colspan=3 | Vacant
| | Chauncey W. Reed (R) died February 9, 1956.<br/>Republican hold.
| nowrap |
|-
!
| Noah M. Mason
| | Republican
| 1936
| Incumbent re-elected.
| nowrap |
|-
!
| Leo E. Allen
| | Republican
| 1932
| Incumbent re-elected.
| nowrap |
|-
!
| Leslie C. Arends
| | Republican
| 1934
| Incumbent re-elected.
| nowrap |
|-
!
| Harold H. Velde
| | Republican
| 1948
| | Incumbent retired.<br/>Republican hold.
| nowrap |
|-
!
| Robert B. Chiperfield
| | Republican
| 1938
| Incumbent re-elected.
| nowrap |
|-
!
| Sid Simpson
| | Republican
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Peter F. Mack Jr.
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| William L. Springer
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Charles W. Vursell
| | Republican
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Melvin Price
| | Democratic
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| Kenneth J. Gray
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|}
Indiana
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Ray Madden
| | Democratic
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Charles A. Halleck
| | Republican
| 1935
| Incumbent re-elected.
| nowrap |
|-
!
| Shepard Crumpacker
| | Republican
| 1950
| | Incumbent retired.<br/>Republican hold.
| nowrap |
|-
!
| E. Ross Adair
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| John V. Beamer
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Cecil M. Harden
| | Republican
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| William G. Bray
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Winfield K. Denton
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Earl Wilson
| | Republican
| 1940
| Incumbent re-elected.
| nowrap |
|-
!
| Ralph Harvey
| | Republican
| 1947
| Incumbent re-elected.
| nowrap |
|-
!
| Charles B. Brownson
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|}
Iowa
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Fred Schwengel
| | Republican
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Henry O. Talle
| | Republican
| 1938
| Incumbent re-elected.
| nowrap |
|-
!
| H. R. Gross
| | Republican
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Karl M. LeCompte
| | Republican
| 1938
| Incumbent re-elected.
| nowrap |
|-
!
| Paul Cunningham
| | Republican
| 1940
| Incumbent re-elected.
| nowrap |
|-
!
| James I. Dolliver
| | Republican
| 1944
| | Incumbent lost re-election.<br/>Democratic gain.
| nowrap |
|-
!
| Ben F. Jensen
| | Republican
| 1938
| Incumbent re-elected.
| nowrap |
|-
!
| Charles B. Hoeven
| | Republican
| 1942
| Incumbent re-elected.
| nowrap |
|}
Kansas
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| William H. Avery
| | Republican
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Errett P. Scrivner
| | Republican
| 1943
| Incumbent re-elected.
| nowrap |
|-
!
| Myron V. George
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Edward Herbert Rees
| | Republican
| 1936
| Incumbent re-elected.
| nowrap |
|-
!
| Clifford R. Hope
| | Republican
| 1926
| | Incumbent retired.<br/>Democratic gain.
| nowrap |
|-
!
| Wint Smith
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|}
Kentucky
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Noble Jones Gregory
| | Democratic
| 1936
| Incumbent re-elected.
| nowrap |
|-
!
| William Natcher
| | Democratic
| 1953
| Incumbent re-elected.
| nowrap |
|-
!
| John M. Robsion Jr.
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Frank Chelf
| | Democratic
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| Brent Spence
| | Democratic
| 1930
| Incumbent re-elected.
| nowrap |
|-
!
| John C. Watts
| | Democratic
| 1951
| Incumbent re-elected.
| nowrap |
|-
!
| Carl D. Perkins
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Eugene Siler
| | Republican
| 1954
| Incumbent re-elected.
| nowrap |
|}
Louisiana
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| F. Edward Hébert
| | Democratic
| 1940
| Incumbent re-elected.
| nowrap |
|-
!
| Hale Boggs
| | Democratic
| 1940<br/>1942 <br/>1946
| Incumbent re-elected.
| nowrap |
|-
!
| Edwin E. Willis
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Overton Brooks
| | Democratic
| 1936
| Incumbent re-elected.
| nowrap |
|-
!
| Otto Passman
| | Democratic
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| James H. Morrison
| | Democratic
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| T. Ashton Thompson
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| George S. Long
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|}
Maine
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Robert Hale
| | Republican
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Charles P. Nelson
| | Republican
| 1948
| | Incumbent retired.<br/>Democratic gain.
| nowrap |
|-
!
| Clifford McIntire
| | Republican
| 1951
| Incumbent re-elected.
| nowrap |
|}
Maryland
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Edward T. Miller
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| James Devereux
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Edward Garmatz
| | Democratic
| 1947
| Incumbent re-elected.
| nowrap |
|-
!
| George Fallon
| | Democratic
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| Richard Lankford
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| DeWitt Hyde
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Samuel Friedel
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|}
Massachusetts
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| John W. Heselton
| | Republican
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| Edward Boland
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Philip J. Philbin
| | Democratic
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Harold Donohue
| | Democratic
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Edith Nourse Rogers
| | Republican
| 1925
| Incumbent re-elected.
| nowrap |
|-
!
| William H. Bates
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Thomas J. Lane
| | Democratic
| 1941
| Incumbent re-elected.
| nowrap |
|-
!
| Torbert Macdonald
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Donald W. Nicholson
| | Republican
| 1947
| Incumbent re-elected.
| nowrap |
|-
!
| Laurence Curtis
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Tip O'Neill
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| John W. McCormack
| | Democratic
| 1928
| Incumbent re-elected.
| nowrap |
|-
!
| Dick Wigglesworth
| | Republican
| 1928
| Incumbent re-elected.
| nowrap |
|-
!
| Joseph W. Martin Jr.
| | Republican
| 1924
| Incumbent re-elected.
| nowrap |
|}
Michigan
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Thaddeus M. Machrowicz
| | Democratic
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| George Meader
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| August E. Johansen
| | Republican
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Clare Hoffman
| | Republican
| 1934
| Incumbent re-elected.
| nowrap |
|-
!
| Gerald Ford
| | Republican
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Donald Hayworth
| | Democratic
| 1954
| | Incumbent lost re-election.<br/>Republican gain.
| nowrap |
|-
!
| Jesse P. Wolcott
| | Republican
| 1930
| | Incumbent retired.<br/>Republican hold.
| nowrap |
|-
!
| Alvin Morell Bentley
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Ruth Thompson
| | Republican
| 1950
| | Incumbent lost renomination.<br/>Republican hold.
| nowrap |
|-
!
| Elford Albin Cederberg
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Victor A. Knox
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| John B. Bennett
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Charles Diggs
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Louis C. Rabaut
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| John D. Dingell Jr.
| | Democratic
| 1955
| Incumbent re-elected.
| nowrap |
|-
!
| John Lesinski Jr.
| | Democratic
| 1932
| Incumbent re-elected.
| nowrap |
|-
!
| Martha Griffiths
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| George A. Dondero
| | Republican
| 1932
| | Incumbent retired.<br/>Republican hold.
| nowrap |
|}
Minnesota
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| August H. Andresen
| | Republican
| 1934
| Incumbent re-elected.
| nowrap |
|-
!
| Joseph P. O'Hara
| | Republican
| 1940
| Incumbent re-elected.
| nowrap |
|-
!
| Roy Wier
| | Democratic-Farmer-Labor
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Eugene McCarthy
| | Democratic-Farmer-Labor
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Walter Judd
| | Republican
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Fred Marshall
| | Democratic-Farmer-Labor
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| H. Carl Andersen
| | Republican
| 1938
| Incumbent re-elected.
| nowrap |
|-
!
| John Blatnik
| | Democratic-Farmer-Labor
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Coya Knutson
| | Democratic-Farmer-Labor
| 1954
| Incumbent re-elected.
| nowrap |
|}
Mississippi
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Thomas Abernethy
| | Democratic
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Jamie Whitten
| | Democratic
| 1941
| Incumbent re-elected.
| nowrap |
|-
!
| Frank E. Smith
| | Democratic
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| John Bell Williams
| | Democratic
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| W. Arthur Winstead
| | Democratic
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| William M. Colmer
| | Democratic
| 1932
| Incumbent re-elected.
| nowrap |
|}
Missouri
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Frank M. Karsten
| | Democratic
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Thomas B. Curtis
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Leonor Sullivan
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| George H. Christopher
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Richard Bolling
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| William Raleigh Hull Jr.
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Dewey Short
| | Republican
| 1934
| | Incumbent lost re-election.<br/>Democratic gain.
| nowrap |
|-
!
| A. S. J. Carnahan
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Clarence Cannon
| | Democratic
| 1922
| Incumbent re-elected.
| nowrap |
|-
!
| Paul C. Jones
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Morgan M. Moulder
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|}
Montana
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Lee Metcalf
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Orvin B. Fjare
| | Republican
| 1954
| | Incumbent lost re-election.<br/>Democratic gain.
| nowrap |
|}
Nebraska
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Phil Weaver
| | Republican
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Jackson B. Chase
| | Republican
| 1954
| | Incumbent retired.<br/>Republican hold.
| nowrap |
|-
!
| R. D. Harrison
| | Republican
| 1951
| Incumbent re-elected.
| nowrap |
|-
!
| Arthur L. Miller
| | Republican
| 1942
| Incumbent re-elected.
| nowrap |
|}
Nevada
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| C. Clifton Young
| | Republican
| 1952
| | Incumbent retired to run for U. S. Senate.<br/>Democratic gain.
| nowrap |
|}
New Hampshire
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Chester E. Merrow
| | Republican
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Perkins Bass
| | Republican
| 1954
| Incumbent re-elected.
| nowrap |
|}
New Jersey
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Charles A. Wolverton
| | Republican
| 1926
| Incumbent re-elected.
| nowrap |
|-
!
| T. Millet Hand
| | Republican
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| James C. Auchincloss
| | Republican
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Frank Thompson
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Peter Frelinghuysen Jr.
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Harrison A. Williams
| | Democratic
| 1953
| | Incumbent lost re-election.<br/>Republican gain.
| nowrap |
|-
!
| William B. Widnall
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Gordon Canfield
| | Republican
| 1940
| Incumbent re-elected.
| nowrap |
|-
!
| Frank C. Osmers Jr.
| | Republican
| 1951
| Incumbent re-elected.
| nowrap |
|-
!
| Peter W. Rodino
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Hugh J. Addonizio
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Robert Kean
| | Republican
| 1938
| Incumbent re-elected.
| nowrap |
|-
!
| Alfred Sieminski
| | Democratic
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| T. James Tumulty
| | Democratic
| 1954
| | Incumbent lost re-election.<br/>Republican gain.
| nowrap |
|}
New Mexico
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| John J. Dempsey
| | Democratic
| 1950
| Incumbent re-elected.
| rowspan=2 nowrap |
|-
!
| Antonio M. Fernández
| | Democratic
| 1942
| Incumbent re-elected.
|}
New York
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Stuyvesant Wainwright
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Steven Derounian
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Frank J. Becker
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Henry J. Latham
| | Republican
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| Albert H. Bosch
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Lester Holtzman
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| James J. Delaney
| | Democratic
| 1944<br/>1946 <br/>1948
| Incumbent re-elected.
| nowrap |
|-
!
| Victor Anfuso
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Eugene Keogh
| | Democratic
| 1936
| Incumbent re-elected.
| nowrap |
|-
!
| Edna F. Kelly
| | Democratic
| 1949
| Incumbent re-elected.
| nowrap |
|-
!
| Emanuel Celler
| | Democratic
| 1922
| Incumbent re-elected.
| nowrap |
|-
!
| Francis E. Dorn
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Abraham J. Multer
| | Democratic
| 1947
| Incumbent re-elected.
| nowrap |
|-
!
| John J. Rooney
| | Democratic
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| John H. Ray
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Adam Clayton Powell Jr.
| | Democratic
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| Frederic Coudert Jr.
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| James G. Donovan
| | Democratic
| 1950
| | Incumbent lost re-election as a Republican.<br/>Democratic hold.
| nowrap |
|-
!
| Arthur George Klein
| | Democratic
| 1946
| | Incumbent retired to run for New York Supreme Court.<br/>Democratic hold.
| nowrap |
|-
!
| Irwin D. Davidson
| | Democratic
| 1954
| | Incumbent retired to run for New York County Court of General Sessions.<br/>Democratic hold.
| nowrap |
|-
!
| Herbert Zelenko
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| James C. Healey
| | Democratic
| February 7, 1956
| Incumbent re-elected.
| nowrap |
|-
!
| Isidore Dollinger
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Charles A. Buckley
| | Democratic
| 1934
| Incumbent re-elected.
| nowrap |
|-
!
| Paul A. Fino
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Ralph A. Gamble
| | Republican
| 1937
| | Incumbent retired.<br/>Republican hold.
| nowrap |
|-
!
| Ralph W. Gwinn
| | Republican
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| Katharine St. George
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| J. Ernest Wharton
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Leo W. O'Brien
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Dean P. Taylor
| | Republican
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Bernard W. Kearney
| | Republican
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Clarence E. Kilburn
| | Republican
| 1940
| Incumbent re-elected.
| nowrap |
|-
!
| William R. Williams
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| R. Walter Riehlman
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| John Taber
| | Republican
| 1922
| Incumbent re-elected.
| nowrap |
|-
!
| W. Sterling Cole
| | Republican
| 1934
| Incumbent re-elected.
| nowrap |
|-
!
| Kenneth Keating
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Harold C. Ostertag
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| William E. Miller
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Edmund P. Radwan
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| John R. Pillion
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Daniel A. Reed
| | Republican
| 1918
| Incumbent re-elected.
| nowrap |
|}
North Carolina
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Herbert C. Bonner
| | Democratic
| 1940
| Incumbent re-elected.
| nowrap |
|-
!
| Lawrence H. Fountain
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Graham A. Barden
| | Democratic
| 1934
| Incumbent re-elected.
| nowrap |
|-
!
| Harold D. Cooley
| | Democratic
| 1934
| Incumbent re-elected.
| nowrap |
|-
!
| R. Thurmond Chatham
| | Democratic
| 1948
| | Incumbent lost renomination.<br/>Democratic hold.
| nowrap |
|-
!
| Carl T. Durham
| | Democratic
| 1938
| Incumbent re-elected.
| nowrap |
|-
!
| Frank Ertel Carlyle
| | Democratic
| 1948
| | Incumbent lost renomination.<br/>Democratic hold.
| nowrap |
|-
!
| Charles B. Deane
| | Democratic
| 1946
| | Incumbent lost renomination.<br/>Democratic hold.
| nowrap |
|-
!
| Hugh Quincy Alexander
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Charles R. Jonas
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Woodrow W. Jones
| | Democratic
| 1950
| | Incumbent retired.<br/>Democratic hold.
| nowrap |
|-
!
| George A. Shuford
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|}
North Dakota
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Usher L. Burdick
| | Republican-NPL
| 1948
| Incumbent re-elected.
| rowspan=2 nowrap |
|-
!
| Otto Krueger
| | Republican
| 1952
| Incumbent re-elected.
|}
Ohio
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Gordon H. Scherer
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| William E. Hess
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Paul F. Schenck
| | Republican
| 1951
| Incumbent re-elected.
| nowrap |
|-
!
| William McCulloch
| | Republican
| 1947
| Incumbent re-elected.
| nowrap |
|-
!
| Cliff Clevenger
| | Republican
| 1938
| Incumbent re-elected.
| nowrap |
|-
!
| James G. Polk
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Clarence J. Brown
| | Republican
| 1938
| Incumbent re-elected.
| nowrap |
|-
!
| Jackson E. Betts
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Thomas L. Ashley
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Thomas A. Jenkins
| | Republican
| 1924
| Incumbent re-elected.
| nowrap |
|-
!
| Oliver P. Bolton
| | Republican
| 1952
| | Incumbent retired.<br/>Republican hold.
| nowrap |
|-
!
| John M. Vorys
| | Republican
| 1938
| Incumbent re-elected.
| nowrap |
|-
!
| A. David Baumhart Jr.
| | Republican
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| William H. Ayres
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| John E. Henderson
| | Republican
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Frank T. Bow
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| J. Harry McGregor
| | Republican
| 1940
| Incumbent re-elected.
| nowrap |
|-
!
| Wayne Hays
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Michael J. Kirwan
| | Democratic
| 1936
| Incumbent re-elected.
| nowrap |
|-
!
| Michael A. Feighan
| | Democratic
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Charles Vanik
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Frances P. Bolton
| | Republican
| 1940
| Incumbent re-elected.
| nowrap |
|-
!
| William E. Minshall Jr.
| | Republican
| 1954
| Incumbent re-elected.
| nowrap |
|}
Oklahoma
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Page Belcher
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Ed Edmondson
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Carl Albert
| | Democratic
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Tom Steed
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| John Jarman
| | Democratic
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Victor Wickersham
| | Democratic
| 1948
| | Incumbent lost renomination.<br/>Democratic hold.
| nowrap |
|}
Oregon
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| A. Walter Norblad
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Sam Coon
| | Republican
| 1952
| | Incumbent lost re-election.<br/>Democratic gain.
| nowrap |
|-
!
| Edith Green
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Harris Ellsworth
| | Republican
| 1942
| | Incumbent lost re-election.<br/>Democratic gain.
| nowrap |
|}
Pennsylvania
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| William A. Barrett
| | Democratic
| 1944<br/>1946 <br/>1948
| Incumbent re-elected.
| nowrap |
|-
!
| colspan=3 | Vacant
| | William T. Granahan (D) died May 25, 1956.<br/>Democratic hold.<br/>Winner was also elected to finish the term; see above.
| nowrap |
|-
!
| James A. Byrne
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Earl Chudoff
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| William J. Green Jr.
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Hugh Scott
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Benjamin F. James
| | Republican
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Karl C. King
| | Republican
| 1951
| | Incumbent retired.<br/>Republican hold.
| nowrap |
|-
!
| Paul B. Dague
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Joseph L. Carrigg
| | Republican
| 1951
| Incumbent re-elected.
| nowrap |
|-
!
| Daniel Flood
| | Democratic
| 1944<br/>1946 <br/>1948<br/>1952 <br/>1954
| Incumbent re-elected.
| nowrap |
|-
!
| Ivor D. Fenton
| | Republican
| 1938
| Incumbent re-elected.
| nowrap |
|-
!
| Samuel K. McConnell Jr.
| | Republican
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| George M. Rhodes
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Francis E. Walter
| | Democratic
| 1932
| Incumbent re-elected.
| nowrap |
|-
!
| Walter M. Mumma
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Alvin Bush
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Richard M. Simpson
| | Republican
| 1937
| Incumbent re-elected.
| nowrap |
|-
!
| James M. Quigley
| | Democratic
| 1954
| | Incumbent lost re-election.<br/>Republican gain.
| nowrap |
|-
!
| James E. Van Zandt
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Augustine B. Kelley
| | Democratic
| 1940
| Incumbent re-elected.
| nowrap |
|-
!
| John P. Saylor
| | Republican
| 1949
| Incumbent re-elected.
| nowrap |
|-
!
| Leon H. Gavin
| | Republican
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Carroll D. Kearns
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Frank M. Clark
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Thomas E. Morgan
| | Democratic
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| James G. Fulton
| | Republican
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| Herman P. Eberharter
| | Democratic
| 1936
| Incumbent re-elected.
| nowrap |
|-
!
| Bob Corbett
| | Republican
| 1938<br/>1940 <br/>1944
| Incumbent re-elected.
| nowrap |
|-
!
| Elmer J. Holland
| | Democratic
| 1942 <br/>1942 <br/>1956
| Incumbent re-elected.
| nowrap |
|}
Rhode Island
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Aime Forand
| | Democratic
| 1940
| Incumbent re-elected.
| nowrap |
|-
!
| John E. Fogarty
| | Democratic
| 1940
| Incumbent re-elected.
| nowrap |
|}
South Carolina
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| L. Mendel Rivers
| | Democratic
| 1940
| Incumbent re-elected.
| nowrap |
|-
!
| John J. Riley
| | Democratic
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| William J. B. Dorn
| | Democratic
| 1946<br/>1948 <br/>1950
| Incumbent re-elected.
| nowrap |
|-
!
| Robert T. Ashmore
| | Democratic
| 1953
| Incumbent re-elected.
| nowrap |
|-
!
| James P. Richards
| | Democratic
| 1932
| | Incumbent retired.<br/>Democratic hold.
| nowrap |
|-
!
| John L. McMillan
| | Democratic
| 1938
| Incumbent re-elected.
| nowrap |
|}
South Dakota
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Harold Lovre
| | Republican
| 1948
| | Incumbent lost re-election.<br/>Democratic gain.
| nowrap |
|-
!
| E. Y. Berry
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|}
Tennessee
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| B. Carroll Reece
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Howard Baker Sr.
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| James B. Frazier Jr.
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Joe L. Evins
| | Democratic
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| colspan=3 | Vacant
| | Percy Priest (D) died October 12, 1956.<br/>Democratic hold.
| nowrap |
|-
!
| Ross Bass
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Tom J. Murray
| | Democratic
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Jere Cooper
| | Democratic
| 1928
| Incumbent re-elected.
| nowrap |
|-
!
| Clifford Davis
| | Democratic
| 1940
| Incumbent re-elected.
| nowrap |
|}
Texas
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Wright Patman
| | Democratic
| 1928
| Incumbent re-elected.
| nowrap |
|-
!
| Jack Brooks
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Brady P. Gentry
| | Democratic
| 1952
| | Incumbent retired.<br/>Democratic hold.
| nowrap |
|-
!
| Sam Rayburn
| | Democratic
| 1912
| Incumbent re-elected.
| nowrap |
|-
!
| Bruce Alger
| | Republican
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Olin E. Teague
| | Democratic
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| John Dowdy
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Albert Thomas
| | Democratic
| 1936
| Incumbent re-elected.
| nowrap |
|-
!
| Clark W. Thompson
| | Democratic
| 1947
| Incumbent re-elected.
| nowrap |
|-
!
| Homer Thornberry
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| William R. Poage
| | Democratic
| 1936
| Incumbent re-elected.
| nowrap |
|-
!
| Jim Wright
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Frank N. Ikard
| | Democratic
| 1951
| Incumbent re-elected.
| nowrap |
|-
!
| John J. Bell
| | Democratic
| 1954
| | Incumbent lost renomination.<br/>Democratic hold.
| nowrap |
|-
!
| Joe M. Kilgore
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| J. T. Rutherford
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Omar Burleson
| | Democratic
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Walter E. Rogers
| | Democratic
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| George H. Mahon
| | Democratic
| 1934
| Incumbent re-elected.
| nowrap |
|-
!
| Paul J. Kilday
| | Democratic
| 1938
| Incumbent re-elected.
| nowrap |
|-
!
| O. C. Fisher
| | Democratic
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Martin Dies Jr.
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|}
Utah
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Henry Aldous Dixon
| | Republican
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| William A. Dawson
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|}
Vermont
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Winston L. Prouty
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|}
Virginia
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Edward J. Robeson Jr.
| | Democratic
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Porter Hardy Jr.
| | Democratic
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| J. Vaughan Gary
| | Democratic
| 1945
| Incumbent re-elected.
| nowrap |
|-
!
| Watkins Abbitt
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| William M. Tuck
| | Democratic
| 1953
| Incumbent re-elected.
| nowrap |
|-
!
| Dick Poff
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Burr Harrison
| | Democratic
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Howard W. Smith
| | Democratic
| 1930
| Incumbent re-elected.
| nowrap |
|-
!
| W. Pat Jennings
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| Joel Broyhill
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|}
Washington
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Thomas Pelly
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Jack Westland
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| Russell V. Mack
| | Republican
| 1947
| Incumbent re-elected.
| nowrap |
|-
!
| Hal Holmes
| | Republican
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Walt Horan
| | Republican
| 1942
| Incumbent re-elected.
| nowrap |
|-
!
| Thor C. Tollefson
| | Republican
| 1946
| Incumbent re-elected.
| nowrap |
|-
!
| Don Magnuson
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|}
West Virginia
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Bob Mollohan
| | Democratic
| 1952
| | Retired to run for Governor of West Virginia.<br/>Republican gain.
| nowrap |
|-
!
| Harley O. Staggers
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Cleveland M. Bailey
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Maurice G. Burnside
| | Democratic
| 1954
| | Incumbent lost re-election.<br/>Republican gain.
| nowrap |
|-
!
| Elizabeth Kee
| | Democratic
| 1951
| Incumbent re-elected.
| nowrap |
|-
!
| Robert Byrd
| | Democratic
| 1952
| Incumbent re-elected.
| nowrap |
|}
Wisconsin
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Lawrence H. Smith
| | Republican
| 1941
| Incumbent re-elected.
| nowrap |
|-
!
| Glenn Robert Davis
| | Republican
| 1947
| | Retired to run for U. S. Senate.<br/>Republican hold.
| nowrap |
|-
!
| Gardner R. Withrow
| | Republican
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Clement Zablocki
| | Democratic
| 1948
| Incumbent re-elected.
| nowrap |
|-
!
| Henry S. Reuss
| | Democratic
| 1954
| Incumbent re-elected.
| nowrap |
|-
!
| William Van Pelt
| | Republican
| 1950
| Incumbent re-elected.
| nowrap |
|-
!
| Melvin Laird
| | Republican
| 1952
| Incumbent re-elected.
| nowrap |
|-
!
| John W. Byrnes
| | Republican
| 1944
| Incumbent re-elected.
| nowrap |
|-
!
| Lester Johnson
| | Democratic
| 1953
| Incumbent re-elected.
| nowrap |
|-
!
| Alvin O'Konski
| | Republican
| 1942
| Incumbent re-elected.
| nowrap |
|}
Wyoming
{| class=wikitable
|- valign=bottom
! rowspan=2 | District
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! First elected
|-
!
| Keith Thomson
| | Republican
| 1954
| Incumbent re-elected.
| nowrap |
|}
Non-voting delegates
Alaska Territory
<!---->
{| class=wikitable
|-
! rowspan=2 | District
! colspan=3 | Incumbent
! colspan=2 | This race
|-
! Representative
! Party
! First elected
! Results
! Candidates
|-
!
| Bob Bartlett
| | Democratic
| 1944
| Incumbent re-elected.
| nowrap |
|}
Hawaii Territory
|-
!
| Elizabeth P. Farrington
| | Republican
| 1954
| | Incumbent lost re-election.<br/>Democratic gain.
| nowrap |
|}
See also
- 1956 United States elections
- 1956 United States Senate elections
- 1956 United States presidential election
- 1956 United States gubernatorial elections
- 84th United States Congress
- 85th United States Congress