Thomas Southwell, 1st Baron Southwell PC (Ire), known as Sir Thomas Southwell, 2nd Baronet from 1681 to 1717, was an Irish peer and politician.
- Occupation
- politician
- Position held
- Member of Parliament in the Parliament of Ireland, Member of the Privy Council of Ireland
- Born
- 1665
- Died
- August 4, 1720