The 1956 United States presidential election in Missouri took place on November 6, 1956, as part of the 1956 United States presidential election. Democrat Adlai Stevenson II narrowly won the state over the Republican incumbent, Dwight 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; with this exception, Missouri chose the eventual winner of each U.S. presidential contest between the 1904 election and the 2004 election. Missouri was the only state Eisenhower won in 1952 that Stevenson managed to flip. As of 2020, this is also the last election in which the Republican nominee won the presidency without carrying Missouri.