John Sim (or similar) may refer to:
Politics
edit- John Symme, 14th-century English politician, MP for Canterbury
- John Peter Sim (1917–2015), Australian politician known as Peter Sim
Sports
edit- 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