The 1936 United States Senate Special Election within the State of Iowa occurred on November 3, 1936, following the death of incumbent Senator Richard Louis Murphy in an automobile accident. Representative Guy Mark Gillette (D-IA) and Editor of the Chariton Herald-Patriot, Berry F. Halden(R-IA) were the two major party contenders in this election. George F. Buresh (FL-IA) and two other candidates also ran. The result of this election was Gillette beating out both other candidates, and winning with 52% of the votes cast.

Guy Mark Gillette was an American politician serving as a Democratic U.S. Representative and Senator from Iowa. In the U.S. Senate, Gillette was elected, re-elected, defeated, elected again, and defeated again.