Sir John Trevor (1563–1630) was a Welsh politician.
He was the second son of John Trevor of Trevalyn, Denbighshire, and the younger brother of Richard Trevor and older brother of Thomas Trevor and Sackville Trevor.He served Charles Howard, 1st Earl of Nottingham, as did his brothers Richard and Sackville.
Trevor represented Howard's pocket boroughs (Reigate in 1593 and 1601 and Bletchingley in 1597, 1604, and 1614) in the House of Commons between 1592 and 1621. In 1598 he became Surveyor of the Queen's Ships, and in 1603 he was knighted. In 1621 he was elected MP for Bodmin and in 1625 for East Looe.
His son, John, and grandson, also John, were both MPs.