William Legge, 4th Earl of Dartmouth FRS, SA, styled The Honourable William Legge until 1801 and Viscount Lewisham between 1801 and 1810, was a British peer.
- Occupation
- politician
- Position held
- member of the 4th Parliament of the United Kingdom
- Citizenship
- United Kingdom of Great Britain and Ireland, Kingdom of Great Britain
- Born
- November 29, 1784
- Died
- November 22, 1853