Michael Oldisworth (1591–1664) was an English politician who sat in the House of Commons variously between 1624 and 1653.
In 1624 Oldisworth became Member of Parliament for Old Sarum after Sir Arthur Ingram chose to sit for York instead.
He was re-elected MP for Old Sarum in 1625, 1626 and 1628 and sat until 1629 when King Charles decided to rule without parliament for eleven years.
His patron was a puritan and had broken with the King, and Oldisworth continued to support the parliamentarian cause.
He was appointed keeper of Windsor Great Park in 1650 and master of the prerogative office.