William Lowther, 1st Earl of Lonsdale, KG, also known as Sir William Lowther, 2nd Baronet, of Little Preston, from 1788 to 1802, and William Lowther, 2nd Viscount Lowther, from 1802 to 1807, was a British Tory politician and nobleman known for building Lowther Castle.
- Occupation
- politician
- Position held
- member of the 1st Parliament of the United Kingdom, member of the 15th Parliament of Great Britain, member of the 16th Parliament of Great Britain, member of the 18th Parliament of Great Britain
- Citizenship
- Kingdom of Great Britain
- Born
