1958 United States Senate election in Missouri
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 County results Symington: 50–60% 60–70% 80–90% >90% Palmer: 50–60% 60–70% | |||||||||||||||||
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The 1958 United States Senate election in Missouri was held on November 4, 1958.
Incumbent Senator Stuart Symington was re-elected to a second term in office.
Democratic primary
Candidates
- Lamar Dye, Gladstone resident
- Lawrence Hastings, Aurora resident
- Stuart Symington, incumbent Senator
Results
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic | Stuart Symington (incumbent) | 365,470 | 92.13% | |
| Democratic | Lawrence Hastings | 19,954 | 5.03% | |
| Democratic | Lamar Dye | 11,262 | 2.84% | |
| Total votes | 396,686 | 100.00% | ||
Republican primary
Candidates
- Homer Cotton, nominee for Missouri's 8th congressional district in 1938
- Herman Grosby, perennial candidate
- Hazel Palmer, attorney, President of the Business and Professional Women's Foundation, and daughter of former U.S. Representative John William Palmer
- William McKinley Thomas, perennial candidate
Results
Hazel Palmer became the first woman ever nominated for United States Senate in Missouri.
Palmer
- 30–40%
- 40–50%
- 50–60%
- 60–70%
- 70–80%
- >90%
Thomas
- 20–30%
- 30–40%
- 40–50%
Cotton
- 30–40%
- 40–50%
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Republican | Hazel Palmer | 61,481 | 44.63% | |
| Republican | William McKinley Thomas | 36,438 | 26.45% | |
| Republican | Homer Cotton | 27,023 | 19.62% | |
| Republican | Herman G. Grosby | 12,818 | 9.31% | |
| Total votes | 137,760 | 100.00% | ||
General election
Results
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Democratic | Stuart Symington (incumbent) | 780,083 | 66.45% |  12.46 | |
| Republican | Hazel Palmer | 393,847 | 33.55% |  12.39 | |
| Total votes | 1,173,930 | 100.00% | |||
