Sir William Pooley (died 5 August 1629) was an English landowner and politician who sat in the House of Commons at various times between 1621 and 1629.

Pooley was of Boxted, Suffolk and was knighted by James I. In 1621, he was elected Member of Parliament for Preston. He was elected MP for both Preston and Sudbury in 1624 and chose to sit for Sudbury. In 1626 he was elected MP for Wigan. He was elected MP for Sudbury again in 1628 and sat until 1629 when King Charles decided to rule without parliament, and then did so for eleven years.

His daughter Judith married Sir Humphrey May.

Parliament of England
Preceded byEdward Mosley Henry BanisterMember of Parliament for Preston 1621–1624 With: Edward MosleySucceeded byEdward Mosley Sir William Hervey
Preceded byEdward Osbourne Brampton GurdonMember of Parliament for Sudbury 1624 With: Robert CraneSucceeded bySir Nathaniel Barnardiston Robert Crane
Preceded byFrancis Downes Edward BridgemanMember of Parliament for Wigan 1626 With: Sir Anthony St JohnSucceeded byEdward Bridgeman Sir Anthony St John
Preceded byThomas Smith Sir Nathaniel BarnardistonMember of Parliament for Sudbury 1628–1629 With: Robert CraneParliament suspended until 1640