The 1944 United States presidential election in Illinois took place on November 7, 1944, as part of the 1944 United States presidential election. State voters chose 28 representatives, or electors, to the Electoral College, who voted for president and vice president.

The 1944 United States presidential election was the 40th quadrennial presidential election. It was held on Tuesday, November 7, 1944. The election took place during World War II, which ended the following year. Incumbent Democratic President Franklin D. Roosevelt defeated Republican Thomas E. Dewey to win an unprecedented fourth term. It was also the fifth presidential election in which both major party candidates were registered in the same home state; the others have been in 1860, 1904, 1920, 1940, and 2016.