Aynsley Thomas Dunbar (born 10 January 1946) is an English drummer. He has worked with John Mayall, Frank Zappa, Jeff Beck, Journey, Jefferson Starship, Nils Lofgren, Eric Burdon, Shuggie Otis, Ian Hunter, Lou Reed, David Bowie, Mick Ronson, Whitesnake, Pat Travers, Sammy Hagar, Michael Schenker, UFO, Michael Chapman, Jake E. Lee, Leslie West, Kathi McDonald, Keith Emerson, Mike Onesko, Herbie Mann and Flo & Eddie. Dunbar was inducted into the Rock and Roll Hall of Fame as a member of Journey in 2017.

Aynsley Thomas Dunbar was born in Liverpool, England. He started his professional career in Derry Wilkie and the Pressmen in 1963. In December 1964 he joined Merseybeat group the Mojos, who were renamed Stu James & the Mojos, with original members vocalist Stu James and guitarist Nick Crouch and bass player Lewis Collins (later an actor in The Professionals). This line-up continued until 1966. Dunbar then auditioned for the Jimi Hendrix Experience and Hendrix had difficulty deciding between Dunbar and Mitch Mitchell – the latter won Hendrix’s coin flip.^{[citation needed]} Dunbar then joined John Mayall’s Bluesbreakers replacing Hughie Flint. He stayed with Mayall until the spring of 1967 (playing on the A Hard Road album), and was replaced by Mick Fleetwood.