Percy Brereton Colquhoun (28 September 1866 – 23 October 1936) was an Australian parliamentarian, lawyer and sportsman.
Colquhoun was a first grade tennis player and played fifty-five games for New South Wales versus Victoria from 1889 until 1899.
In lawn bowls Colquhoun represented New South Wales against all the Australian States and New Zealand for over two decades.
In 1909 Colquhoun was president of the Lawn Tennis Association of Australasia, and refereed Sydney's first Davis Cup challenge round final.
He was chairman of committees for his last five and a half months in parliament and was a strong debater and an authority on issues of constitutional law.