1956 United States presidential election in South Dakota

The 1956 United States presidential election in South Dakota took place on November 6, 1956, as part of the 1956 United States presidential election. Voters chose four representatives, or electors, to the Electoral College, who voted for president and vice president.

South Dakota was won by incumbent President Dwight D. Eisenhower (R–Pennsylvania), running with Vice President Richard Nixon, with 58.39 percent of the popular vote, against Adlai Stevenson (D–Illinois), running with Tennessee Senator Estes Kefauver, with 41.61% of the popular vote. Although President Eisenhower easily won the state, it was by a significantly smaller margin than he did four years prior.