William Halsey (disambiguation)

William Halsey may refer to:


 * William Halsey Jr. (1882–1959), U.S. Naval officer and the commander of the United States Third Fleet during part of the Pacific War against Japan.
 * William F. Halsey Sr. (1853–1920), his father, U.S. naval officer
 * William Darrach Halsey, American encyclopaedist and lexicographer
 * William Melton Halsey (1915-1999), American abstract artist
 * William Halsey (mayor) (1770–1843), mayor of Newark, New Jersey, 1836–1837
 * William Halsey (judge), Irish politician, soldier and judge