William Portman (disambiguation)

William Portman (died 1557) was an English judge and Chief Justice of the King’s Bench.

William Portman may also refer to:


 * William Portman (died c. 1413), MP for Taunton
 * Sir William Portman, 5th Baronet (died 1646), English politician
 * Sir William Portman, 6th Baronet (1643–1690), English politician
 * William Portman (priest), Irish Anglican clergyman