Oliver St John, 3rd Baron St John of Bletso was an English politician who sat in the House of Commons from 1588 until 1596 when he inherited the peerage as Baron St John of Bletso.
- Occupation
- politician
- Position held
- Member of Parliament in the Parliament of England, Member of the 1589 Parliament, Member of the 1593 Parliament, Lord Lieutenant of Huntingdonshire
- Born
- 1540
- Died
- October 2, 1618
