1940 Cal Aggies football team

The 1940 Cal Aggies football team represented the College of Agriculture at Davis—now known as the University of California, Davis—as a member of the Far Western Conference (FWC) during the 1940 college football season. Led by fourth-year head coach Vern Hickey, the Aggies compiled an overall record of 4–4 with a mark of 2–1 in conference play, placing second in the FWC. The team outscored its opponents 120 to 81 for the season.

The Cal Aggies were ranked at No. 301 (out of 697 college football teams) in the final rankings under the Litkenhous Difference by Score system for 1940.

The Cal Aggies played home games at A Street field on campus in Davis, California.