Passmore is a surname. Notable people with the surname include:
- Deborah Griscom Passmore (1840–1911), botanical illustrator for the U.S. Department of Agriculture
- George Passmore (born 1942), of the artists Gilbert and George
- George Passmore (lacrosse) (1889–1952), American lacrosse player
- John Passmore (1914–2004), Australian philosopher
- John Passmore (artist) (1904–1984), Australian artist
- Lori Passmore, Canadian/British scientist
- Matt Passmore (born 1973), Australian actor
- Norman Passmore (1915–2003), American football coach
- Rhianon Passmore (born 1972), British politician
- Steve Passmore (born 1973), Canadian former professional ice hockey goaltender
- Tim Passmore (born 1959), British police and crime commissioner
- Todd Passmore (born 1970), better known as Barry Houston, American semi-retired professional wrestler
- Walter Passmore (1867–1946), English singer and actor
- William L. Passmore (1910–2002), American jockey and horse trainer
- William T. Passmore (1882–1955), American lacrosse player
- William Passmore (boxer) (1915–1986), South African boxer