Bonar may refer to:
- Given name
- Bonar Bain (born 1923), actor
- Bonar Colleano (1924–1958), actor
- Bonar Law (1858–1923), politician
- Surname
- Andrew Bonar (1810–1892), minister
- Bud Bonar (1906–1970), football player
- Dan Bonar (born 1956), ice hockey player
- Haley Bonar (born 1983), singer-songwriter
- Horatius Bonar (1808–1889), poet and minister
- Ian Bonar, actor
- James Bonar (1852–1941), civil servant, economist and historian
- John Bonar, set decorator
- Maureen Bonar, curler
- Thomas Bonar, publisher
- Other
- Bonar-e Ab-e Shirin, a village in Bushehr Province, Iran
- Bonar-e Azadegan, a village in Bushehr Province, Iran
- Bonar-e Soleymani, a village in Bushehr Province, Iran
- Bonar Bridge, a village in Scotland
- Bonar Bridge F.C., football club
- Bonar Hall, historical building
- Bonar River