Sir William Scawen (c. 1644 – 18 October 1722) was a British MP and Governor of the Bank of England.
His father was Robert Scawen of Horton, Buckinghamshire.
After some years in business he was appointed a Director of the Bank of England in 1694 and again from 1699 until his death.
In 1696 he had sufficient wealth to purchase a half interest in Carshalton manor.
Scawen married Mary, the daughter of Sir William Maynard, 1st Baronet of Walthamstow, Essex but had no legitimate children.