William Atherton (born 1947) is an American actor.
William Atherton may also refer to:
William Atherton (mayor of Preston), (c.1705–1745) William Atherton (minister) (1775–1850), Wesleyan minister William Atherton (politician) (1806–1864), Scottish barrister and politician William Atherton (plantation owner) (1742–1803), English merchant and plantation owner William Atherton (soldier) (1793–1863), Kentucky rifleman and veteran of the War of 1812 William H. Atherton (1867–1950), Canadian writer, historian, academic and scholar Billy Atherton (1905 – 1976), English footballer