Baynes is a surname. Notable people with the surname include:
Adam Baynes, English politician
Aron Baynes (born 1986), New Zealand-born Australian basketball player
Cary F. Baynes, translator of Richard Wilhelm's German edition of the I Ching into English
Helton Godwin Baynes, (1882–1943), analytical psychologist, author, translator of Carl Jung
James Baynes (1766–1837), English painter
Courtney Baynes American author and musician
Pauline Baynes (born 1922), English illustrator
Robert Lambert Baynes (1796–1869), British naval officer
Stephen Baynes (born 1956), Australian dancer
Thomas Mann Baynes (1794–1876), English artist, son of James Baynes
Thomas Spencer Baynes (1823–1887), English philosopher
Fictional characters:
Inspector Baynes, fictional character from the Sherlock Holmes story The Adventure of Wisteria Lodge
Baynes, character from the illustrated novel "Out Of The Abyss" and main IP of Build A' Berg Entertainment Incorporated