John Colquhoun
John Colquhoun may refer to:
- Sir John Colquhoun, 2nd Baronet, of the Colquhoun baronets
- Sir John Colquhoun, 1st Baronet
- John Colquhoun (minister), Scottish minister
- John Campbell Colquhoun British MP for Dunbartonshire, 1832–1835, Kilmarnock Burghs, 1837–1841, and Newcastle-under-Lyme, 1842–1847
- John Colquhoun (sportsman), sportsman and Scots sportswriter
- John Frederick Colquhoun, World Scout Committee member
- John Colquhoun (footballer, born 1940), Scottish football player, see List of Oldham Athletic A.F.C. players
- John Colquhoun (footballer), Scottish football player