Simon Thelwall or Theloal (1525/26–1586), of Plas y Ward, Llanynys, Denbighshire, was a Welsh politician.
- Occupation
- politician
- Position held
- Member of Parliament in the Parliament of England, Member of the March 1553 Parliament, Member of the October 1553 Parliament, Member of the 1559 Parliament
- Born
- 1520
- Died
- 1586