John Trelawny
John Trelawny may refer to:
- John Trelawny I, MP for Bodmin (UK Parliament constituency) in 1397, father of John Trelawny II
- John Trelawny II, MP for Cornwall (UK Parliament constituency) 1413–1421, son of John Trelawny I
- John Trelawny III, MP for Liskeard (UK Parliament constituency) 1421 and Lostwithiel (UK Parliament constituency) 1449
- John Trelawny (died 1563), Member of Parliament for Liskeard
- John Trelawny (died 1568), his son, High Sheriff of Cornwall
- Sir John Trelawny, 1st Baronet, Royalist before and during the English Civil War
- John Trelawny (died 1680), MP for West Looe
- John Trelawny (died 1682), MP for West Looe (UK Parliament constituency)
- John Trelawny (1633–1706), MP for Plymouth (UK Parliament constituency)
- Sir John Trelawny, 4th Baronet, MP for East Looe, West Looe and Liskeard
- Sir John Salusbury-Trelawny, 9th Baronet, MP for Tavistock and Eastern Cornwall