John Fitzwilliam

John Fitzwilliam or FitzWilliam may refer to:


 * John Fitzwilliam (died 1562), MP for Midhurst (UK Parliament constituency)
 * John Fitzwilliam (divine) (died 1699)
 * John Fitzwilliam, 2nd Earl Fitzwilliam (1681–1728)
 * John Fitzwilliam (British Army officer) (1714–1789), MP for Windsor