Sir William Portman, 6th Baronet, FRS was an English politician who represented Taunton and Somerset in the House of Commons of England from 1661 to 1690. Portman was the son of Sir William Portman, 5th Baronet and his wife Anne Colles, daughter of John Colles. He inherited the baronetcy on the death of his father in 1646.
- Occupation
- politician
- Position held
- Member of Parliament in the Parliament of England, Member of the 1661-79 Parliament, Member of the 1679 Parliament, Member of the 1680-81 Parliament
- Citizenship
- Kingdom of England
- Born
- September 5, 1643
