This is a list of various things that took place in 1940.
- 10 - Chuck Norris (Navasota, Texas)
- 24 - Don Jardine (Moncton, New Brunswick)
- 25 - Jim Breaks (Bradford, Yorkshire), Joe Carollo (Wyandotte, Michigan)
- 20 - El Matemático
- 10 - Chucho Villa
- 15 - Kay Noble (St. Joseph, Missouri)
- 17 - Baron Von Raschke (Omaha, Nebraska)
- 22 - Tom Jones (Oklahoma City, Oklahoma)
- 28 - Les Thatcher (Cincinnati, Ohio)
- 5 - Carlos Ignacio Carrillo Contreras (Topilejo, Michoacán)
- 5 - Adrian Street (Brynmawr, South Wales)
- 5 - Bello Adrián
- 23 - Ray Steele defeats Bronko Nagurski to win the World Heavyweight Championship (National Wrestling Association).