Bầu cử tổng thống Hoa Kỳ tại Missouri năm 1956

The 1956 United States presidential election in Missouri took place on November 6, 1956, as part of the 1956 United States presidential election. Voters chose 13 representatives, or electors, to the Electoral College, who voted for president and vice president.

Democrat Adlai Stevenson II narrowly won the state of Missouri over the Republican incumbent, Dwight D. Eisenhower, thanks in large part to a 72,000-vote margin in St. Louis. This election saw the state deviate from its traditional status as a national bellwether; except for this election, Missouri voted for the winner of each U.S. presidential contest from 1904 to 2004. Missouri was the only state Eisenhower won in 1952 that Stevenson managed to flip. This is the last election in which the Republican nominee won the presidency without carrying Missouri. This was also the only state outside the old Confederacy that Stevenson won.