The 1940 United States presidential election was the 39th quadrennial presidential election. It was held on Tuesday, November 5, 1940. Incumbent Democratic President Franklin D. Roosevelt defeated Republican businessman Wendell Willkie to be reelected for an unprecedented third term in office. Until 1988, this was the last time in which the incumbent's party won three consecutive presidential elections. It was also the fourth presidential election in which both major party candidates were registered in the same home state; the others have been in 1860, 1904, 1920, 1944, and 2016.

The 1860 United States presidential election was the 19th quadrennial presidential election, held on Tuesday, November 6, 1860. In a four-way contest, the Republican Party ticket of Abraham Lincoln and Hannibal Hamlin won a national popular plurality, a popular majority in the North where states already had abolished slavery, and a national electoral majority comprising only Northern electoral votes. Lincoln's election thus served as the main catalyst of the states that would become the Confederacy seceding from the Union. This marked the first time that a Republican was elected president. It was also the first presidential election in which both major party candidates were registered in the same home state; the others have been in 1904, 1920, 1940, 1944, and 2016.