Westby may refer to:
Places England Westby, Lancashire Westby, Lincolnshire U.S.A. Westby, Montana Westby, North Dakota Westby, Wisconsin Australia Westby, New South Wales
People
George Westby (died 1984?), British psychologist Jim Westby (born 1937), American ice hockey player Wardell Westby (died 1756), British politician Edward Westby Donovan (1821–1897), British Army commander Finn Michael Westby Caspersen (1941–2009), American financier Westby James Davoren (1928–2010), Australian politician Westby Perceval (1854–1928), New Zealand politician