William Ewart
William Ewart may refer to:
- William Ewart (British politician) (1798–1869), Member of Parliament between 1828 and 1868
- William Ewart Gladstone (1809–1898), Prime Minister of the United Kingdom four times between 1868 and 1894
- William Ewart (physician) (1848-1929), English physician
- William Dana Ewart, founder of Link-Belt Machinery Company in 1880
- Sir William Ewart, 1st Baronet (1817–1889), MP for Belfast
- William Ewart Astill (1888–1948), English Test cricketer
- William Ewart Boulter (1892–1955), English recipient of the Victoria Cross
- William Ewart Hiscock (1886–1941), Royal Navy officer
- William Ewart Napier (1881–1952), American chess master
- Ivan Ewart, Sir William Ivan Cecil Ewart, 6th Baronet, (1919–1995), Northern Irish naval officer, businessman and charity worker
- William Ewart Berry, 1st Viscount Camrose, British newspaper publisher
- William Ewart Fairbairn