William Wentworth-Fitzwilliam
William Wentworth-Fitzwilliam may refer to:
- William Fitzwilliam, 4th Earl Fitzwilliam, styled Viscount Milton until 1756, British Whig statesman
- William Wentworth-Fitzwilliam, 6th Earl Fitzwilliam, British peer and Liberal politician
- William Wentworth-Fitzwilliam, 7th Earl Fitzwilliam, British aristocrat
- William Wentworth-FitzWilliam, Viscount Milton, British nobleman, explorer and politician
- William Henry Wentworth-FitzWilliam, British Liberal, and later Liberal Unionist politician