Charles William Slingsby "Sim" Duncombe, 3rd Earl of Feversham DSO, styled the Hon. Charles Duncombe until 1915 and then Viscount Helmsley until he succeeded his father in 1916, was a British Conservative politician.
- Occupation
- military personnel, politician
- Position held
- member of the House of Lords, Lord-in-waiting, Lord-in-waiting, Parliamentary Secretary to the Board of Agriculture and Fisheries
- Citizenship
- United Kingdom
- Born
- November 2, 1906