The 1936 United States presidential election in South Dakota took place on November 3, 1936, as part of the 1936 United States presidential election. Voters chose four representatives, or electors to the Electoral College, who voted for president and vice president.
South Dakota voted for the Democratic candidate Franklin D. Roosevelt over Republican candidate Alf Landon. Roosevelt won the state by a margin of 11.53%. , this is the last occasion when the following counties have voted for a Democratic presidential candidate: Douglas, Fall River, Haakon, Harding, Hughes and Perkins. Roosevelt remains the only Democrat in history to carry the state twice, and this is the only time in history that South Dakota has voted Democratic in two consecutive presidential races.
Incumbent President Franklin D. Roosevelt ran unopposed in the Democratic primary, held on May 5, 1936.
U.S. Senator William Borah from Idaho and former South Dakota Governor Warren E. Green (leading a "No Preference" delegate list) faced off in the Republican primary, held on May 5, 1936.
The general election was held on November 3, 1936. Armstrong County did not participate.