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

• John Wentworth-FitzWilliam (1852 – 1889), British Liberal politician
• John Fitzwilliam Stairs