1908 United States presidential election in South Dakota

The 1908 United States presidential election in South Dakota took place on November 3, 1908. Voters chose four representatives, or electors to the Electoral College, who voted for president and vice president.

South Dakota voted for the Republican nominee, Secretary of War William Howard Taft of Ohio and his running mate James S. Sherman of New York. They defeated the Democratic nominees, former U.S. Representative of Nebraska William Jennings Bryan and his running mate John W. Kern of Indiana. Taft won the state by a margin of 23.76 percentage points.

William Bryan had previously won South Dakota during his run against William McKinley in 1896 but would later lose the state to McKinley four years later in 1900.