John Slaughter

• John Brooks Slaughter, American engineer, Director of National Science Foundation, 1980–1982
• John Bunyan Slaughter, American rancher and banker.
• John Horton Slaughter, American lawman, Civil War soldier and gambler known as Texas John Slaughter
• Texas John Slaughter (TV series) series on Wonderful World of Disney, 1958–1961
• John Slaughter (MP), Member of Parliament for Gloucestershire
• John Slaughter (guitarist), member of Chris Barber's jazz band