Michael Oldisworth (1591–1664) was an English politician who sat in the House of Commons variously between 1624 and 1653. He supported the Parliamentary side in the English Civil War. Oldisworth was the son of Arnold Oldsworth and his wife Lucy Barty daughter of Francis Barty of Antwerp. He was a fellow of Magdalen College, Oxford, and became secretary to the 3rd and 4th Earls of Pembroke. He entered parliament in the interest of the Earls. Oldisworth married Jane Thomas, widow of William Thomas and daughter of Sir John Stradling, 1st Baronet.