The 1926 United States Senate elections were elections for the United States Senate that occurred in the middle of Republican President Calvin Coolidge's second term. The 32 seats of Class 3 were contested in regular elections, and special elections were held to fill vacancies. The Republican majority was reduced by seven seats.
Gains, losses, and holds
Retirements
One Republican and one Democrat retired instead of seeking re-election.
{| class="wikitable sortable plainrowheaders"
|-
! scope="col" |State
! scope="col" |Senator
! scope="col" |Replaced by
|-
! Alabama
| |
| |
|-
! Iowa
| |
| |
|}
Defeats
Ten Republicans sought re-election but lost in the primary or general election. One Republican sought election to finish the unexpired term but lost in the general election and one Republican sought election to finish the unexpired term and election to a full term but lost in both the special election and the regular election.
{| class="wikitable sortable plainrowheaders"
|-
! scope="col" |State
! scope="col" |Senator
! scope="col" |Replaced by
|-
! Arizona
| |
| |
|-
! Colorado
| |
| |
|-
! Illinois
| |
| |
|-
! Kentucky
| |
| |
|-
! Maryland
| |
| |
|-
! Massachusetts
| |
| |
|-
! Missouri
| |
| |
|-
! New York
| |
| |
|-
! Oklahoma
| |
| |
|-
! Oregon
| |
| |
|-
! Pennsylvania
| |
| |
|-
! Wisconsin
| |
| |
|}
Death
One Republican died on August 23, 1926, and his seat remained vacant until the election.
{| class="wikitable sortable plainrowheaders"
|-
! scope="col" |State
! scope="col" |Senator
! scope="col" |Replaced by
|-
! Maine
| |
| |
|}
Post-election changes
{| class="wikitable sortable plainrowheaders"
|-
! scope="col" |State
! scope="col" |Senator
! scope="col" |Replaced by
|-
! New Mexico
| |
| |
|-
! Idaho
| |
| |
|-
! Ohio
| |
| |
|-
! Michigan
| |
| |
|}
Change in composition
Before the elections
At the beginning of 1926.
{| class="wikitable" style="text-align:center" width=800px
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| rowspan=2 | R<br/><br/>
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| colspan=9 align=right | Majority →
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| | R<br/><br/>
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Elections results
{| class="wikitable" style="text-align:center" width=800px
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| | FL
| rowspan=2 | R<br/><br/>
|-
| colspan=9 align=right | Majority →
|-
| | R<br/><br/>
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| | R<br/><br/><hr/><br/>
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| colspan=2 |
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|}
At the beginning of the next Congress
{| class="wikitable" style="text-align:center" width=800px
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|-
| colspan=9 align=right | Plurality ↑
|-
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| | V<br/><br/>
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|-
| colspan=2 |
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|}
{|
|- valign=top
! Key
|
{| class=wikitable
|-
| align=center width=35px | D
| Democratic
|-
| align=center width=35px | FL
| Farmer–Labor
|-
| align=center width=35px | R
| Republican
|}
|}
Race summaries
Special elections during the 69th Congress
In these special elections, the winners were seated during 1926 or before March 4, 1927; ordered by election date.
{| class=wikitable
|- valign=bottom
! rowspan=2 | State
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! Electoral history
|-
! North Dakota<br/>(Class 3)
| Gerald Nye
| | Republican
| 1926
| Interim appointee elected June 30, 1926.<br/>Winner was also elected to the next term, see below.
| nowrap |
|-
! Maine<br/>(Class 2)
| Bert M. Fernald
| | Republican
| 1916 <br/>1918<br/>1924
| | Incumbent died August 23, 1926.<br/>New senator elected September 13, 1926.<br/>Republican hold.
| nowrap |
|-
! Iowa<br/>(Class 3)
| David W. Stewart
| | Republican
| 1926
| Interim appointee elected November 2, 1926.<br/>Winner did not seek election to the next term, see below.
| nowrap |
|-
! Indiana<br/>(Class 1)
| Arthur Raymond Robinson
| | Republican
| 1925
| Interim appointee elected November 2, 1926.
| nowrap |
|-
! Massachusetts<br/>(Class 1)
| William M. Butler
| | Republican
| 1924
| | Interim appointee lost election.<br/>New senator elected November 2, 1926.<br/>Democratic gain.
| nowrap |
|-
! Missouri<br/>(Class 3)
| George H. Williams
| | Republican
| 1925
| | Interim appointee lost election.<br/>New senator elected November 2, 1926.<br/>Democratic gain.<br/>Winner also elected to the next term, see below.
| nowrap |
|}
Elections leading to the 70th Congress
In these general elections, the winners were elected for the term beginning March 4, 1927; ordered by state.
All of the elections involved the Class 3 seats.
{| class=wikitable
|- valign=bottom
! rowspan=2 | State
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! Electoral history
|-
! Alabama
| Oscar Underwood
| | Democratic
| 1914<br/>1920
| | Incumbent retired.<br/>New senator elected.<br/>Democratic hold.
| nowrap |
|-
! Arizona
| Ralph H. Cameron
| | Republican
| 1920
| | Incumbent lost re-election.<br/>New senator elected.<br/>Democratic gain.
| nowrap |
|-
! Arkansas
| Thaddeus H. Caraway
| | Democratic
| 1920
| Incumbent re-elected.
| nowrap |
|-
! California
| Samuel M. Shortridge
| | Republican
| 1920
| Incumbent re-elected.
| nowrap |
|-
! Colorado
| Rice W. Means
| | Republican
| 1924
| | Incumbent lost renomination.<br/>New senator elected.<br/>Republican hold.
| nowrap |
|-
! Connecticut
| Hiram Bingham III
| | Republican
| 1924
| Incumbent re-elected.
| nowrap |
|-
! Florida
| Duncan U. Fletcher
| | Democratic
| 1908<br/>1914<br/>1920
| Incumbent re-elected.
| nowrap |
|-
! Georgia
| Walter F. George
| | Democratic
| 1922
| Incumbent re-elected.
| nowrap |
|-
! Idaho
| Frank R. Gooding
| | Republican
| 1920
| Incumbent re-elected.
| nowrap |
|-
! Illinois
| William B. McKinley
| | Republican
| 1920
| | Incumbent lost renomination, then died.<br/>New senator elected.<br/>Winner appointed to finish term, but was not seated for either appointment or for next term.<br/>Republican hold, although the Senate did not consider the winner to be a senator.
| nowrap |
|-
! Indiana
| James E. Watson
| | Republican
| 1916 <br/>1920
| Incumbent re-elected.
| nowrap |
|-
! Iowa
| David W. Stewart
| | Republican
| 1926
| | Interim appointee retired.<br/>New senator elected.<br/>Republican hold.<br/>Winner did not run to finish the term, see above.
| nowrap |
|-
! Kansas
| Charles Curtis
| | Republican
| 1914<br/>1920
| Incumbent re-elected.
| nowrap |
|-
! Kentucky
| Richard P. Ernst
| | Republican
| 1920
| | Incumbent lost re-election.<br/>New senator elected.<br/>Democratic gain.
| nowrap |
|-
! Louisiana
| Edwin S. Broussard
| | Democratic
| 1920
| Incumbent re-elected.
| nowrap |
|-
! Maryland
| Ovington Weller
| | Republican
| 1920
| | Incumbent lost re-election.<br/>New senator elected.<br/>Democratic gain.
| nowrap |
|-
! Missouri
| George H. Williams
| | Republican
| 1925
| | Incumbent appointee lost election. Winner also elected to finish the current term; see above.<br/>New senator elected.<br/>Democratic gain.
| nowrap |
|-
! Nevada
| Tasker Oddie
| | Republican
| 1920
| Incumbent re-elected.
| nowrap |
|-
! New Hampshire
| George H. Moses
| | Republican
| 1918 <br/>1920
| Incumbent re-elected.
| nowrap |
|-
! New York
| James Wadsworth
| | Republican
| 1914<br/>1920
| | Incumbent lost re-election.<br/>New senator elected.<br/>Democratic gain.
| nowrap |
|-
! North Carolina
| Lee S. Overman
| | Democratic
| 1903<br/>1909<br/>1914<br/>1920
| Incumbent re-elected.
| nowrap |
|-
! North Dakota
| Gerald Nye
| | Republican
| 1925 <br/>1926
| Incumbent re-elected.
| nowrap |
|-
! Ohio
| Frank B. Willis
| | Republican
| 1920
| Incumbent re-elected.
| nowrap |
|-
! Oklahoma
| John W. Harreld
| | Republican
| 1920
| | Incumbent lost re-election.<br/>New senator elected.<br/>Democratic gain.
| nowrap |
|-
! Oregon
| Robert N. Stanfield
| | Republican
| 1920
| | Incumbent lost renomination, then ran as an Independent but lost re-election.<br/>New senator elected.<br/>Republican hold.
| nowrap |
|-
! Pennsylvania
| George W. Pepper
| | Republican
| 1922 <br/>1922
| | Incumbent lost renomination.<br/>New senator elected.<br/>Senate refused to qualify winner due to charges of corruption and fraud concerning the election.<br/>Republican hold, but the Senate would later unseat the winner and declare the seat vacant.
| nowrap |
|-
! South Carolina
| Ellison D. Smith
| | Democratic
| 1908<br/>1914<br/>1920
| Incumbent re-elected.
| nowrap |
|-
! South Dakota
| Peter Norbeck
| | Republican
| 1920
| Incumbent re-elected.
| nowrap |
|-
! Utah
| Reed Smoot
| | Republican
| 1903<br/>1909<br/>1914<br/>1920
| Incumbent re-elected.
| nowrap |
|-
! Vermont
| Porter H. Dale
| | Republican
| 1923
| Incumbent re-elected.
| nowrap |
|-
! Washington
| Wesley L. Jones
| | Republican
| 1909<br/>1914<br/>1920
| Incumbent re-elected.
| nowrap |
|-
! Wisconsin
| Irvine Lenroot
| | Republican
| 1920
| | Incumbent lost renomination.<br/>New senator elected.<br/>Republican hold.
| nowrap |
|}
Closest races
Twelve races had a margin of victory under 10%:
{| class="wikitable sortable"
! State
! Party of winner
! Margin
|-
! Indiana (regular)
| data-sort-value=-0.5 | Republican
| 1.1%
|-
! Indiana (special)
| data-sort-value=-0.5 | Republican
| 2.2%
|-
! Oregon
| data-sort-value=-0.5 | Republican
| 3.5%
|-
! Missouri
| data-sort-value=-0.5 | Democratic (flip)
| 3.6%
|-
! Kentucky
| data-sort-value=-0.5 | Democratic (flip)
| 3.6%
|-
! Illinois
| data-sort-value=-0.5 | Republican
| 3.8%
|-
! Colorado
| data-sort-value=-0.5 | Republican
| 3.9%
|-
! New York
| data-sort-value=-0.5 | Democratic (flip)
| 4.1%
|-
! Missouri
| data-sort-value=-0.5 | Democratic (flip)
| 4.2%
|-
! Washington
| data-sort-value=-0.5 | Republican
| 4.8%
|-
! Massachusetts
| data-sort-value=-0.5 | Democratic (flip)
| 5.5%
|-
! Ohio
| data-sort-value=-0.5 | Republican
| 6.6%
|}
Alabama
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