Sir William Lowther, 1st Baronet was an English landowner from Swillington, West Yorkshire, and a baronet in the Baronetage of Great Britain.
- Occupation
- politician
- Position held
- Member of Parliament in the Parliament of England, member of the 1st Parliament of Great Britain, member of the 2nd Parliament of Great Britain, member of the 5th Parliament of Great Britain
- Born
- June 8, 1663
- Died
- March 6, 1729, March 6, 1728