1958 United States Senate election in Missouri

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.

Candidates

 * Lamar Dye, Gladstone resident
 * Lawrence Hastings, Aurora resident
 * Stuart Symington, incumbent Senator

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. [[File:1958 US Senate election in MO GOP primary.svg|thumb|200px|Primary results by county: {{legend|#ed8783|Palmer}}

{{legend|#fbdedd|30–40%}}

{{legend|#f1b4b2|40–50%}}

{{legend|#ed8783|50–60%}}

{{legend|#e55651|60–70%}}

{{legend|#d02923|70–80%}}

{{legend|#850400|>90%}} {{legend|#c88fe4|Thomas}}

{{legend|#fdeeee|20–30%}}

{{legend|#f2dffc|30–40%}}

{{legend|#dcb7ef|40–50%}} {{legend|#7bc7ae|Cotton}}

{{legend|#d8f3ea|30–40%}}

{{legend|#a8dccb|40–50%}} ]]