John St Aubyn
John St Aubyn may refer to:
- John [St Aubyn (sheriff)], Sheriff of Cornwall, 1568
- John St Aubyn (Member of the Addled Parliament), MP for Cornwall, 1614; MP for Mitchell, 1621
- John St Aubyn (Parliamentarian) of Clowance, MP for Tregony, 1640; Cornwall, 1656; St Ives, 1659,1660
- Sir John St Aubyn, 1st Baronet, MP for Mitchell (UK Parliament constituency)
- Sir John St Aubyn, 2nd Baronet, MP for Helston (UK Parliament constituency)
- Sir John St Aubyn, 3rd Baronet
- Sir John St Aubyn, 4th Baronet, MP for Grampound (UK Parliament constituency)
- Sir John St Aubyn, 5th Baronet
- John St Aubyn, 1st Baron St Levan
- John St Aubyn, 4th Baron St Levan