William Fullerton

William Fullerton may refer to:
 * William Fullerton (politician) (1888–?), Australian politician
 * William Young Fullerton (1857–1932), Irish hymnwriter
 * William Morton Fullerton (1865–1952), American journalist
 * William Fullerton (lawyer) (1817–1900), American lawyer
 * William Fullerton Jr. (1854–1888), his son, American-born composer in London
 * Billy Fullerton, see the song Billy Boys
 * William Fullerton (diplomat) (born 1939), British diplomat
 * William Fullerton (surgeon) (died 1805), Scottish surgeon