# 1980 United States Senate election in Missouri

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The 1980 United States Senate election in Missouri was held on November 4, 1980. Incumbent Senator Thomas Eagleton defeated Republican nominee Gene McNary with 52.00% of the vote. As of 2024, this is the last time the Democrats won the Class 3 Senate seat in Missouri.

## Primary elections

Primary elections were held on August 5, 1980.

### Democratic primary
#### Candidates

* Thomas Eagleton, incumbent United States Senator
* Lee C. Sutton, former State Representative
* Herb Fillmore

#### Results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Thomas Eagleton (incumbent) | 553,392 | 85.75 |
| | Democratic | Lee C. Sutton | 53,280 | 8.26 |
| | Democratic | Herb Fillmore | 38,677 | 5.99 |
| Total votes | Total votes | Total votes | 645,349 | 100.00 |

### Republican primary
#### Candidates

* Gene McNary, County Executive of St. Louis County
* David Doctorian, State Senator
* Morris Duncan
* Gregory Hansman

#### Results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Gene McNary | 197,060 | 61.53 |
| | Republican | David Doctorian | 82,332 | 25.71 |
| | Republican | Morris Duncan | 21,959 | 6.86 |
| | Republican | Gregory Hansman | 18,893 | 5.90 |
| Total votes | Total votes | Total votes | 320,244 | 100.00 |

## General election
### Candidates

Major party candidates
* Thomas Eagleton, Democratic
* Gene McNary, Republican
Other candidates
* Martha Pettit, Socialist Workers

### Results

1980 United States Senate election in Missouri :
| Party | Party | Candidate | Votes | % |
| | Democratic | Thomas Eagleton (incumbent) | 1,074,859 | 52.00% |
| | Republican | Gene McNary | 985,399 | 47.67% |
| | Socialist Workers | Martha Pettit | 6,707 | 0.32% |
| Majority | Majority | Majority | 89,460 | |
| Turnout | Turnout | Turnout | 2,066,965 | |
| | Democratic hold | Democratic hold | Swing | |