William Marmion (disambiguation)

William Marmion (1845–1896) was an Australian politician.

William Marmion may also refer to:


 * William Marmion, Baron Marmion of Torrington (died 1265), English clergyman and member of Simon de Montfort's Parliament
 * William Marmion (died 1274) (died 1274), son of Robert Marmion (died 1242)
 * William Marmion (Norham Castle Knight), possibly the Leicestershire MP, see John Marmion, 4th Baron Marmion of Winteringham
 * Sir William Marmion (Leics MP 1307), member of parliament for Leicestershire
 * Sir William Marmion (Lincs MP 1357), member of parliament for Lincolnshire
 * William Marmion (died 1529) (1461–1529), member of parliament for Gloucester
 * William H. Marmion (1907–2002), bishop of the Episcopal Diocese of Southwestern Virginia
 * Bill Marmion (born 1954), Australian member of the Legislative Assembly of Western Australia