William Tait MP FRSE (c. 1755 – 7 January 1800) was an 18th-century Scottish politician and landowner.
He was born in Edinburgh around 1755, the second son of Alexander Tait (died 1781), a Writer to the Signet (WS) and Principal Clerk of Session to the courts, and his wife Janet Blair of Blair.
He studied law at the University of Edinburgh and was admitted into Lincoln's Inn in 1777.
He became an advocate in 1780, and acted as personal legal advisor to Henry Dundas.
This article about a Member of the Parliament of Great Britain (1707–1800) representing a Scottish constituency is a stub.