John Rashleigh (21 January 1619 – 13 March 1693) of Coombe, near Fowey in Cornwall, was MP for Fowey from 1661 to 1679. He was a member of a branch of the more prominent Rashleigh family of Menabilly, near Fowey.
Rashleigh was the only surviving son of Robert Rashleigh (1585 – c. 1667), MP, of Coombe, near Fowey, Cornwall, by his first wife Mary Trefusis, daughter of Thomas Trefusis of Landew.
He matriculated at Brasenose College, Oxford in 1637.