An election for a seat in the United States House of Representatives took place in California's 12th congressional district on November 5, 1946, the date set by law for the elections for the 80th United States Congress. In the 12th district election, the candidates were five-term incumbent Democrat Jerry Voorhis, Republican challenger Richard Nixon, and former congressman and Prohibition Party candidate John Hoeppel. Nixon was elected with 56% of the vote, starting him on the road that would, almost a quarter century later, lead to the presidency.