The 1940 All-Big Six Conference football team consists of American football players chosen by various organizations for All-Big Six Conference teams for the 1940 college football season. The selectors for the 1940 season included the United Press (UP).

All-Big Six selections

Backs

• Paul Christman, Missouri (UP-1 [QB]) (College Football Hall of Fame)
• Harry Hopp, Nebraska (UP-1 [HB])
• Walter Luther, Nebraska (UP-1 [HB])
• John Martin, Oklahoma (UP-1 [FB])
• Roy Petsch, Nebraska (UP-2 [QB])
• Herm Rohrig, Nebraska (UP-2 [HB])
• Jack Jacobs, Oklahoma (UP-2 [HB])
• Henry Wilder, Iowa State (UP-2 [FB])

Ends

• Ray Prochaska, Nebraska (UP-1)
• Bill Jennings, Oklahoma (UP-1)
• Fred Preston, Nebraska (UP-2)
• Bob Crocker, Missouri (UP-2)

Tackles

• Forrest Behm, Nebraska (UP-1) (College Football Hall of Fame)
• Bernie Weiner, Kansas State (UP-1)
• Roger Eason, Oklahoma (UP-2)
• Bob Wakeman, Missouri (UP-2)

Guards

• Warren Alfson, Nebraska (UP-1)
• Hal Lahar, Oklahoma (UP-1)
• Tom Smith, Iowa State (UP-2)
• Ed Schwartzkopf, Nebraska (UP-2)

Centers

• Don Pierce, Kansas (UP-1)
• Ken Hamkil, Kansas State (UP-2)

Key

UP = United Press^[1]