Bynoe is a surname. Notable people with the surname include:

Benjamin Bynoe (1804–1865), naval surgeon on HMS Beagle with Charles Darwin
Hilda Bynoe (1921–2013), Governor of Grenada
Peter Bynoe (born 1951), American lawyer and businessman
Philip Bynoe, American musician
Robin Bynoe (born 1941), West Indian cricketer from Barbados