William Legge
William Legge may refer to:
- William Legge , British Member of Parliament for Southampton, 1661–1670
- William Legge , son of the above, British Member of Parliament for Portsmouth, 1685
- William Legge, 1st Earl of Dartmouth, Lord Privy Seal
- William Legge, 2nd Earl of Dartmouth, British statesman, Secretary of State for the Colonies 1772–1775
- William Legge, 4th Earl of Dartmouth, Fellow of the Royal Society
- William Legge, 5th Earl of Dartmouth, Conservative politician
- William Legge, 6th Earl of Dartmouth, Conservative politician
- William Legge, 7th Earl of Dartmouth, Conservative politician
- William Legge, 10th Earl of Dartmouth, British peer and politician
- William Kaye Legge, senior British Army officer during the First World War
- William Vincent Legge, Australian ornithologist
- William Legge , Canadian Anglican priest