William Borlase (15 October 1620 – October 1665) was an English politician who sat in the House of Commons between 1659 and 1665. Borlase was the younger son of Sir William Borlase of Marlow who was MP for Wycombe, and his wife Amy Popham, daughter of Sir Francis Popham. His elder brother was Sir John Borlase, 1st Baronet. He matriculated at Magdalen Hall, Oxford on 30 April 1635, aged 14, and was a student at Inner Temple in 1637.