Andrew Sinclair (1861 – 28 June 1938) was a Scottish-born Australian politician.
He was born in Dunfermline to cabinetmaker Richard Sinclair and Anne Dewar.
On 30 March 1899 he married Sarah Jane Clark, with whom he had three sons.
In 1912 he was appointed to the New South Wales Legislative Council as a Labor nominee.
He left the party in the conscription split in 1916 and became a Nationalist, remaining in the Legislative Council until its reconstitution in 1934.