William Marmion

William Marmion may refer to:

• William Marmion, Baron Marmion of Torrington (died 1265), English clergyman and member of Simon de Montfort's Parliament
• William Marmion (died 1529) (1461–1529), member of parliament for Gloucester
• William H. Marmion (1907–2002), bishop of the Episcopal Diocese of Southwestern Virginia
• William Marmion (politician) (1845–1906), Australian politician

See also

• Bill Marmion (born 1954), Australian member of the Legislative Assembly of Western Australia