- Mar 1 Cameron Argetsinger, American auto racing executive (created Watkins Glen Grand Prix Race Course; F1 US Grand Prix 1961-80), born in Youngstown, Ohio (d. 2008)
- Mar 2 Wilhelm Büsing, German equestrian (Olympic silver team eventing, bronze Individual eventing 1952) and coach (Olympics 1956, 60, 64), born in Jade, Germany (d. 2023)
- Mar 4 Dinny Pails, Australian tennis player (Australian C'ship 1947), born in Nottingham, England (d. 1986)
- Mar 5 Elmer Valo, American baseball outfielder (one of only 4, four-decade MLB players 1939-61; Philadelphia, KC Athletics), born in Rybník Czechoslovakia (d. 1998)
- Mar 13 Cyril Poole, English cricket batsman (3 Tests, 2 x 50; Nottinghamshire CCC), born in Mansfield, England (d. 1996)
- Mar 14 Lis Hartel, Danish equestrian dressage (Olympic silver 1952, 56; permanently paralyzed her below her knees from polio), born in Hellerup, Denmark (d. 2009)
- Mar 15 Stafford Smythe, Canadian NHL executive (President Toronto Maple Leafs 1961–69, 1970-71), born in Toronto, Ontario (d. 1971)
- Mar 17 Mick Harvey, Australian cricketer (in Newcastle Brother of Neil Test umpire), born in Newcastle, Australia (d. 2016)
- Mar 29 Sam Loxton, Australian cricket batsman (12 Tests, 1 x 100, HS 101; Victoria; National team selector 1970-81), born in Melbourne, Australia (d. 2011)
About March 1921
How Old? 103 years old
Generation: Greatest Generation
Leap Year: No
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions