The 1940 NCAA Cross Country Championships were the third annual cross country meet to determine the team and individual national champions of men's collegiate cross country running in the United States. Since the current multi-division format for NCAA championship did not begin until 1973, all NCAA members were eligible. In total, 21 teams and 90 individual runners contested this championship. The team national championship was won by the Indiana Hoosiers, their second, while the individual championship was won by Gil Dodds, from Ashland, with a time of 20:30.2.