| 70891 | June 21 | Birth | 1918 – Robert Roosa, American economist and academic (d. 1993) |
| 70892 | June 21 | Birth | 1918 – Tibor Szele, Hungarian mathematician and academic (d. 1955) |
| 70893 | June 21 | Birth | 1918 – Josephine Webb, American engineer |
| 70894 | June 21 | Birth | 1919 – Antonia Mesina, Italian martyr and saint (d. 1935) |
| 70895 | June 21 | Birth | 1919 – Gérard Pelletier, Canadian journalist and politician (d. 1997) |
| 70896 | June 21 | Birth | 1919 – Vladimir Simagin, Russian chess player and coach (d. 1968) |
| 70897 | June 21 | Birth | 1919 – Paolo Soleri, Italian-American architect, designed the Cosanti (d. 2013) |
| 70898 | June 21 | Birth | 1920 – Hans Gerschwiler, Swiss figure skater |
| 70899 | June 21 | Birth | 1921 – Jean de Broglie, French politician (d. 1976) |
| 70900 | June 21 | Birth | 1921 – Judy Holliday, American actress and singer (d. 1965) |
| 70901 | June 21 | Birth | 1921 – Jane Russell, American actress and singer (d. 2011) |
| 70902 | June 21 | Birth | 1921 – William Edwin Self, American actor, producer, and production manager (d. 2010) |
| 70903 | June 21 | Birth | 1922 – Heino Lipp, Estonian decathlete, shot putter, and discus thrower (d. 2006) |
| 70904 | June 21 | Birth | 1923 – Peter Flanigan, American banker and civil servant (d. 2013) |
| 70905 | June 21 | Birth | 1923 – Jacques Hébert, Canadian journalist and politician (d. 2007) |
| 70906 | June 21 | Birth | 1924 – Ezzatolah Entezami, Iranian actor |
| 70907 | June 21 | Birth | 1924 – Wally Fawkes, Canadian-English clarinet player and cartoonist |
| 70908 | June 21 | Birth | 1924 – Pontus Hultén, Swedish art collector and historian (d. 2006) |
| 70909 | June 21 | Birth | 1924 – Jean Laplanche, French psychoanalyst and academic (d. 2012) |
| 70910 | June 21 | Birth | 1924 – Max McNab, Canadian ice hockey player and coach (d. 2007) |
| 70911 | June 21 | Birth | 1925 – Giovanni Spadolini, Italian journalist and politician, 45th Prime Minister of Italy (d. 1994) |
| 70912 | June 21 | Birth | 1925 – Maureen Stapleton, American actress (d. 2006) |
| 70913 | June 21 | Birth | 1926 – George A. Burton, American soldier, accountant, and politician (d. 2014) |
| 70914 | June 21 | Birth | 1926 – Conrad Hall, French-American cinematographer (d. 2003) |
| 70915 | June 21 | Birth | 1926 – Muhsin Mahdi, Iraqi-American islamologist and philosopher (d. 2007) |
| 70916 | June 21 | Birth | 1927 – Carl Stokes, American lawyer, politician, and diplomat, United States Ambassador to Seychelles (d. 1996) |
| 70917 | June 21 | Birth | 1928 – Wolfgang Haken, German-American mathematician and academic |
| 70918 | June 21 | Birth | 1929 – Abdel Halim Hafez, Egyptian singer and actor (d. 1977) |
| 70919 | June 21 | Birth | 1929 – Alexandre Lagoya, Egyptian-Greek guitarist and composer (d. 1999) |
| 70920 | June 21 | Birth | 1930 – Gerald Kaufman, English journalist and politician, Shadow Foreign Secretary |