J
- J.L. Carr (aka "Jim" and "James"; 1912–1994), English novelist, publisher, teacher, and eccentric
- Jack Carr (1876–1948), English professional footballer - Newcastle United 1899–1912
- Jacky Carr (1892–1942), English professional footballer - Middlesbrough, Blackpool, and Hartlepool United
- James Carr (Massachusetts politician) (1777–1818), American politician, U. S. House of Representatives from Massachusetts, son of Francis Carr
- James Carr (musician) (1942–2001), American R&B and soul artist; The Dark End of the Street
- James G. Carr (born 1940), chief judge for the U. S. District Court for Northern District of Ohio
- Jim Carr (born 1951) Canadian businessman and Liberal Party politician in Manitoba
- Jim Carr (US) (born 1965), American technologist, lecturer, and writer, advocate for digital literacy
- Jimmy Carr (born 1972), English comedian known for his deadpan, satirical humour
- Janet Carr, Australian television producer best known for creating the video game talk show Good Game and its spin-off Good Game: Spawn Point
- Jody Carr B.B.A. (born 1975), Canadian, New Brunswick politician
- Joe Carr (1922–2004), Irish amateur golfer
- John Carr (architect) (1723–1807), English architect
- John Carr (cricketer) (born 1963) English cricket executive, father of D.B. Carr
- John Carr (merchant), 16th century merchant & founder of Queen Elizabeth's Hospital School
- John Carr (military lawyer), Captain, prosecutor of suspected terrorists imprisoned at the Guantanamo Bay detainment camp
- John Carr (writer and schoolmaster), LL.D. (1722-1807) was a County Durham born schoolmaster and writer
- John Dickson Carr (1906–1977), American author of detective stories (pen names: Carter Dickson, Carr Dickson, and Roger Fairbairn)
- Joseph Bradford Carr (1828–1895), American general in the Union Army during the American Civil War, New York Secretary of State, (1879–1885)
- Joseph F. Carr (1879–1939) American pro football pioneer, President of the National Football League 1921–1939
- Josh Carr (born 1980) Australian rules footballer, midfielder
- Judy Feld Carr, CM, LL.D (born 1939) Canadian musician and humanitarian
- Julian Carr (Australian politician) (c. 1824–1886), Australian politician, Member of Western Australian Legislative Council from 1868 to 1873
- Julian Carr (industrialist) (1845–1924) American industrialist & philanthropist
- Lou Busch (pseudonym for Loui Karr) (born 1964), American criminal who confessed to the murder of JonBenét Ramsey, but was later cleared
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