William Hilliard

• William Hilliard (bishop), Anglican bishop of Nelson
• William Hilliard (English MP), English Member of Parliament
• William Hilliard (Florida politician), served as Mayor of Tallahassee
• William Hilliard (publisher), American publisher and bookseller in Massachusetts
• William A. Hilliard, American journalist
• William L. Hilliard, Canadian physician and politician in Ontario