William Molyneux (1656–1698) was an Irish natural philosopher and writer on politics.
William Molyneux may also refer to:
William Molyneux, 4th Viscount Molyneux (1655–1717) William Molyneux, 7th Viscount Molyneux (1685–1759), Jesuit priest Sir William Molyneux, 6th Baronet (died 1781), High Sheriff of Nottinghamshire 1737 William Molyneux, 2nd Earl of Sefton (1772–1838), sportsman, gambler and a friend of the Prince Regent William Molyneux, 4th Earl of Sefton (1835–1897), British peer Bill Molyneux (William Mitchell Molyneux, born 1935), Australian horticulturist and author
See also Molyneux