William Ewart

William Ewart may refer to:


 * William Ewart (British politician) (1798–1869), Member of Parliament between 1828 and 1868
 * 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
 * Ivan Ewart (Sir William Ivan Cecil Ewart, 6th Baronet, 1919–1995), Northern Irish naval officer, businessman and charity worker
 * William Ewart Gladstone (1809–1898), British Liberal politician, Prime Minister (1868–74, 1880–85, 1886, 1892–94)