Sir John Turner, 3rd Baronet (1712–1780), of Warham, Norfolk, was a British lawyer and politician who sat in the House of Commons from 1739 to 1774.

[2] He was educated at Greenwich School and was admitted at Middle Temple on 20 February 1729. and Christ's College, Cambridge on 9 January 1730.

He remained in office under Grenville, and supported the Administration over Wilkes and general warrants, but apparently took no part in the debates.

At the 1768 British general election, there was a contest at King's Lynn, and Turner narrowly escaped defeat.

His interest in King's Lynn had been seriously weakened, and he decided not to contest the borough at the 1774 British general election[6] Turner died on 25 June 1780, leaving two daughters, and was buried at Warham.