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)