Authors Born on July 21
- Jaime Murray Actress, 1976
- Jamie Waylett Actor, 1989
- Janet Reno Lawyer, 1938
- Jim Clyburn Politician, 1940
- John B. Keane Playwright, 1928
- John Barrasso Politician, 1952
- John Gardner Novelist, 1933
- John Negroponte Diplomat, 1939
- John Salazar Politician, 1953
- Johnny Evers Baseball Player, 1881
- Jon Lovitz Comedian, 1957
- Jonathan Miller Theatre Director, 1934
- Josh Hartnett Actor, 1978
- Karel Reisz Film Director, 1926
- Karl Deutsch Political Scientist, 1912
- Kass Morgan Author, 1984
- KB Hip-Hop Artist, 1988
- Ken Starr Lawyer, 1946
- Kym Whitley Actress, 1961
- Les Aspin Politician, 1938
- Marshall McLuhan Professor, 1911
- Matthew Prior Poet, 1664
- Megan Abbott Author, 1971
- Michael Connelly Author, 1956
- michael fitzpatrick 1970
- Mick Mulvaney Politician, 1967
- Mohammed Hussein Al Amoudi Businessman, 1946
- Norman Geisler Theologian, 1932
- Norman Jewison Film Director, 1926
- Nyanaponika Thera Monk, 1901
- Paloma Faith Film Actor, 1981
- Paul Wellstone Academic, 1944
- Phil Roe Politician, 1945
- Rirkrit Tiravanija Artist, 1961
- Robin Williams Comedian, 1951
- Rudolph A. Marcus Scientist, 1923
- Sara Carter Musician, 1898
- Sara Sampaio Model, 1991
- Sarah Waters Novelist, 1966
- Siddhartha Mukherjee Scientist, 1970