The 1946 Idaho gubernatorial election was held on November 5. Republican nominee C. A. Robins defeated Democratic incumbent Arnold Williams with 56.37% of the vote. Idaho changed the term for governor from two to four years starting with this election, and the winner was not allowed to run for a second term (self-succession) until 1958. Williams had become governor in November 1945, following the resignation of Charles Gossett, whom Williams immediately appointed to the U.S. Senate.