United States Senate elections, 1956 Race summaries Races leading to the 85th Congress

| State_ | Incumbent | Party | Result_ | Candidates_ |
|---|---|---|---|---|
| Florida | George A. Smathers | Democratic | Re-elected | George A. Smathers (Democratic) Unopposed |
| Georgia | Walter F. George | Democratic | Retired , Democratic hold | Herman E. Talmadge (Democratic) Unopposed |
| Idaho | Herman Welker | Republican | Lost re-election , Democratic gain | Frank Church (Democratic) 56.2% , Herman Welker (Republican) 38.7% |
| Illinois | Everett M. Dirksen | Republican | Re-elected | Everett M. Dirksen (Republican) 54.1% , W. Richard Stengel (Democratic) 45.7% |
| Indiana | Homer E. Capehart | Republican | Re-elected | Homer E. Capehart (Republican) 55.2% , Claude R. Wickard (Democratic) 44.4% |
| Iowa | Bourke B. Hickenlooper | Republican | Re-elected | Bourke B. Hickenlooper (Republican) 53.9% , R. M. Evans (Democratic) 46.1% |
| Kansas | Frank Carlson | Republican | Re-elected | Frank Carlson (Republican) 57.9% , George Hart (Democratic) 40.5% |