Sir Robert Knollys (1588–1659) was an English politician who sat in the House of Commons between 1614 and 1629. Knollys was the 2nd son of Richard Knollys of Stanford-in-the-Vale in Berkshire. He matriculated at Oriel College, Oxford on 13 May 1603, aged 15. He was knighted on 12 January 1613.