| 70921 | June 21 | Birth | 1930 – Mike McCormack, American football player and coach (d. 2013) |
| 70922 | June 21 | Birth | 1931 – Zlatko Grgić, Croatian-Canadian animator, director, and screenwriter (d. 1988) |
| 70923 | June 21 | Birth | 1931 – Margaret Heckler, American journalist, lawyer, and politician, 15th United States Secretary of Health and Human Services |
| 70924 | June 21 | Birth | 1931 – Barbara Levick, English historian and author |
| 70925 | June 21 | Birth | 1931 – Jan Trąbka, Polish neurologist and academic (d. 2012) |
| 70926 | June 21 | Birth | 1932 – Bernard Ingham, English journalist and civil servant |
| 70927 | June 21 | Birth | 1932 – Lalo Schifrin, Argentinian pianist, composer, and conductor |
| 70928 | June 21 | Birth | 1932 – O. C. Smith, American singer (d. 2001) |
| 70929 | June 21 | Birth | 1933 – Bernie Kopell, American actor and screenwriter |
| 70930 | June 21 | Birth | 1934 – Maggie Jones, English actress (d. 2009) |
| 70931 | June 21 | Birth | 1934 – Ken Matthews, English race walker |
| 70932 | June 21 | Birth | 1935 – Monte Markham, American actor, director, and producer |
| 70933 | June 21 | Birth | 1935 – Françoise Sagan, French author and playwright (d. 2004) |
| 70934 | June 21 | Birth | 1936 – Joseph Gosnell, Canadian tribal leader |
| 70935 | June 21 | Birth | 1937 – John Edrich, English cricketer and coach |
| 70936 | June 21 | Birth | 1938 – Eddie Adcock, American singer and banjo player (The Country Gentlemen) |
| 70937 | June 21 | Birth | 1938 – Don Black, English songwriter |
| 70938 | June 21 | Birth | 1938 – John W. Dower, American historian and author |
| 70939 | June 21 | Birth | 1938 – Michael M. Richter, German mathematician and computer scientist |
| 70940 | June 21 | Birth | 1939 – Rubén Berríos, Puerto Rican lawyer and politician |
| 70941 | June 21 | Birth | 1940 – Marika Green, Swedish-French actress |
| 70942 | June 21 | Birth | 1940 – Mariette Hartley, American actress |
| 70943 | June 21 | Birth | 1940 – Enn Klooren, Estonian actor (d. 2011) |
| 70944 | June 21 | Birth | 1940 – Michael Ruse, Canadian philosopher and academic |
| 70945 | June 21 | Birth | 1941 – Aloysius Paul D'Souza, Indian bishop |
| 70946 | June 21 | Birth | 1941 – Joe Flaherty, American-Canadian actor, producer, and screenwriter |
| 70947 | June 21 | Birth | 1941 – Cecil Gordon, American race car driver (d. 2012) |
| 70948 | June 21 | Birth | 1941 – Lyman Ward, Canadian actor |
| 70949 | June 21 | Birth | 1942 – Clive Brooke, Baron Brooke of Alverthorpe, English businessman and politician |
| 70950 | June 21 | Birth | 1942 – Dan Henning, American football player and coach |