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- James Cook (1728–1779), British explorer, navigator, and map maker
- James Cook (Australian footballer), former Australian Football League player
- James Cook (American football), former NFL player
- James M. Cook, New York State Comptroller 1854–1855
- James William Cook (1820–1875), Canadian businessman and political figure
- James Cook (boxer and community worker), UK Boxer
- James Cook (Skins character), a fictional character from the British teen drama, Skins
- James Cook, a member of the band Delphic
- Jamie Cook, guitarist with British band, The Arctic Monkeys
- Jamie Cook (footballer)
- Jesse Cook is a Toronto-based guitarist, born in Paris to Canadian parents.
- Jeffrey Cook (disambiguation), or Jeff Cook, several people
- Jim Cook, NASCAR driver
- Jimmy Cook, former South African cricketer
- Joan Cook (born October 6, 1934 in English Harbour West, Newfoundland) was a Canadian Senator for Newfoundland and Labrador.
- Joan Riddell Cook (January 5, 1922, Portland, Oregon - February 5, 1995,New York City) was an American newspaper journalist and editor, a trade union leader, and a founding director of JAWS (Journalism and Women Symposium). Cook died of breast cancer in 1995 in New York City.
- John Cook (disambiguation) several people
- Jonathan Cook (born 1965) is a British writer and a freelance journalist based in Nazareth, Israel, who writes about the Middle East, and more specifically, the Israeli-Palestinian conflict.
- Jordan Cook (born 20 March 1990) is an English professional footballer, who plays as a striker at Premier League side Sunderland.
- Joseph Cook (disambiguation)
- Herman "Junior" Cook (July 22, 1934 – February 3, 1992) was a hard bop tenor saxophone player.
- Justin Cook (born 1982), American voice actor
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