John Sim (or similar) may refer to:

Politics

• John Symme, 14th-century English politician, MP for Canterbury
• John Peter Sim (1917–2015), Australian politician known as Peter Sim

Sports

• Jock Sim (John Sim, 1922–2000), Scottish footballer (Brighton & Hove Albion)
• Johnny Simm (1929–2018), English footballer (Bolton Wanderers, Bury, Bradford City)
• Jon Sim (born 1977), Canadian ice hockey player

Others

• John Simm (born 1970), English actor
• Jack Sim, Singaporean businessman

See also

• John Sims (disambiguation)