Jem is a given name, sometimes as a nickname for James, Jeremiah, Jeremy, Jemma, or Jemima, and sometimes as an anglicized version of the Turkish name Cem.

People with the name include:

• Jem Belcher (1781–1811), English bare-knuckle boxer
• Jem Cohen (born 1962), American filmmaker
• Jem Finer (born 1955), English musician, artist and composer, a founding member of the Pogues
• Jem Karacan (born 1989), English footballer
• Jem Mace (1831–1910), English bare-knuckle boxer
• Jem Shaw (1836–1888), English cricketer
• Jem Smith (1863–1931), English bare-knuckle boxer
• Jem Stansfield (born 1975), inventor and television presenter
• Jem Ward (1800–1884), English bare-knuckle boxer

• Jerrica "Jem" Benton, protagonist of Jem, an animated TV series, and the 2015 film Jem and the Holograms
• James Matthew "Jem" Blythe in Anne Shirley franchise
• James "Jem" Carstairs in The Infernal Devices trilogy
• Jem Costello, in the soap opera Hollyoaks
• Jem Finch, in the film To Kill a Mockingbird

• Jem (disambiguation)