<br />
| | R<br /><br />
| | R
| | R
| | R
| | R
| | R
|-
| | R
| | R
| | R
| | R
| | R
| | R
| | R
| | R
| | R
| | R
|-
| | R
| | R
| | R
| | R
| | R
| | R
| | R
| | R
| | R
| | R
|-
| | R
| | R
| | R
| | R
| | R
| | R
| | R
| | R
| | R
| | R
|}
{|
|- valign=top
! Key:
|
{| class=wikitable
|-
| align=center | D
| Democratic
|-
| align=center | R
| Republican
|}
|}
Race summaries
Special elections during the 86th Congress
In these special elections, the winner was seated during 1960 or before January 3, 1961; ordered by election date.
{| class="wikitable sortable"
|- valign=bottom
! rowspan=2 | State
! colspan=3 | Incumbent
! rowspan=2 | Results
! rowspan=2 | Candidates
|-
! Senator
! Party
! Electoral history
|-
! North Dakota<br />(Class 1)
|
| | Republican
| nowrap | 1959
| | Interim appointee retired.<br />New senator elected June 28, 1960 and seated August 8, 1960.<br />Democratic-NPL gain.
| nowrap |
|-
! Missouri<br />(Class 3)
|
| | Democratic
| nowrap data-sort-value="1960-09-23"| 1960
| Interim appointee elected November 8, 1960.
| nowrap |
|-
! Oregon<br />(Class 2)
|
| | Democratic
| nowrap data-sort-value="1960-03-16"| 1960
| | Interim appointee retired.<br />New senator elected November 8, 1960 and seated the following day.<br />Winner was also elected to the next term, see below.<br />Democratic hold.
| nowrap |
Alaska
Incumbent Democrat Bob Bartlett was easily re-elected to his second (his first full) term in the U.S. Senate over Republican dentist Lee McKinley after originally being elected in 1958 upon Alaska's anticipated admission as a state into the United States. Bartlett had previously served as the last delegate from Alaska to Congress.