Oliver St John, 5th Baron St John of Bletso KB was an English politician who sat in the House of Commons from 1624 to 1629 and in the House of Lords from 1639. He died fighting in the Parliamentary army in the English Civil War.
- Occupation
- politician
- Position held
- Member of Parliament in the Parliament of England, Member of the 1624-25 Parliament, Member of the 1625 Parliament, Member of the 1626 Parliament
- Born
- 1603
- Died
- October 23, 1642
