John Sheffield, 1st Duke of Buckingham and Normanby, English poet and politician, Lord President of the Council (d. 1721)

John Sheffield, 1st Duke of Buckingham and Normanby, (7 April 1648 – 24 February 1721) was an English poet and Tory politician of the late Stuart period who served as Lord Privy Seal and Lord President of the Council. He was also known by his original title, Lord Mulgrave.