Sir William Morgan KB (8 March 1700 – 24 April 1731) was a Welsh Whig politician of the early 18th century.

He inherited the Tredegar Estate from his father in 1720, and in 1722, entered the House of Commons, being returned for both Brecon and Monmouthshire and choosing to sit for the latter.

[1] Morgan was also one of the Founder Knights of the Order of the Bath upon its revival in 1725.

He was appointed Steward of the King's Lordship of Penkelly, and died at Tredegar in 1731.

This article about a Member of the Parliament of Great Britain (1707–1800) representing a Welsh constituency is a stub.