Sir John Parker (1548– 15 October 1617) was an English soldier and politician. He was the son of Thomas Parker (died 1580) of Ratton, Willingdon, Sussex. He spent time on military service in Ireland before being posted to the Berwick garrison. He was a Member of Parliament for Hastings in 1589; Truro, Cornwall in 1593; Dunheved in 1601; and East Looe in 1604. He died unmarried.