1958 United States Senate election in Minnesota

The 1958 United States Senate election in Minnesota took place on November 4, 1958. Democratic U.S. Representative Eugene McCarthy defeated incumbent Republican U.S. Senator Edward John Thye, who sought a third term. With his victory, McCarthy became the first Democrat ever to be popularly elected to Minnesota's Class 1 Senate seat, and marked the first time since 1859 that Democrats held both Senate seats in the state.

Democratic–Farmer-Labor primary
[[File:1958 Minnesota Democratic–Farmer–Labor primary election results map by county.svg|thumb|Results by county:{{legend|#7996E2|McCarthy}}
 * Eugene J. McCarthy, U.S. Representative from Minnesota's 4th congressional district since 1949
 * Hans R. Miller
 * Hjalmar Petersen, 23rd Governor of Minnesota (1936-1937) and 28th Lieutenant Governor of Minnesota (1935-1936)

{{legend|#A5B0FF|40–50%}}

{{legend|#7996E2|50–60%}}

{{legend|#6674DE|60–70%}}

{{legend|#584CDE|70–80%}}

{{legend|#3933E5|80–90%}}{{legend|#51C2C2|Petersen}}

{{legend|#7DDDDD|40–50%}}

{{legend|#51C2C2|50–60%}}]]

Republican primary

 * Mrs. Peder P. Schmidt
 * Edward C. Slettedahl
 * Edward John Thye, Incumbent U.S. Senator since 1947