Sir Gregory Norton, 1st Baronet (1603 – 26 March 1652) was an English politician who sat in the House of Commons from 1645 to 1652.
He supported the Parliamentary cause in the English Civil War and was one of the regicides of King Charles I. Norton was the eldest surviving son of Henry Norton of Wantage in Berkshire, and probably grew up in Ireland where his father held an administrative post.
He acquired an estate in Sussex upon his marriage to Martha Gunter around 1621, and was made a baronet in 1624.
Like his friend and fellow courtier Humphrey Edwards, Norton supported Parliament on the outbreak of the First Civil War.
During the Commonwealth, Norton was associated with the republican Henry Marten, but he also came under suspicion of profiteering from the sale of confiscated Royalist estates and properties.