John St Aubyn may refer to:
John St Aubyn (sheriff), Sheriff of Cornwall, 1568 John St Aubyn (Member of the Addled Parliament) (c. 1577–1639), MP for Cornwall, 1614; MP for Mitchell, 1621 John St Aubyn (Parliamentarian) (1613–1684) of Clowance, MP for Tregony, 1640; Cornwall, 1656; St Ives, 1659,1660 Sir John St Aubyn, 1st Baronet (1645–1687), MP for Mitchell (UK Parliament constituency) Sir John St Aubyn, 2nd Baronet (1670–1714), MP for Helston (UK Parliament constituency) Sir John St Aubyn, 3rd Baronet (1696–1744) Sir John St Aubyn, 4th Baronet (1726–1772), MP for Grampound (UK Parliament constituency) Sir John St Aubyn, 5th Baronet (1758–1839) John St Aubyn, 1st Baron St Levan (1829–1908) John St Aubyn, 4th Baron St Levan (1919–2013)
See also John Aubyn (disambiguation) St Aubyn baronets