1939 Illinois Fighting Illini football team

The 1939 Illinois Fighting Illini football team was an American football team that represented the University of Illinois during the 1939 Big Ten Conference football season. In their 27th season under head coach Robert Zuppke, the Illini compiled a 3–4–1 record and finished in sixth place in the Big Ten Conference. Bill Lenich was selected as the team's most valuable player.

Illinois was ranked at No. 62 (out of 609 teams) in the final Litkenhous Ratings for 1939.