The 1940 Mississippi State Maroons football team was an American football team that represented Mississippi State College as a member of the Southeastern Conference (SEC) during the 1940 college football season. In their second year under head coach Allyn McKeen, the Maroons compiled an overall record of 10–0–1, with a conference record of 4–0–1, and finished second in the SEC. This was Mississippi State's only undefeated season.