Sir William Beauchamp-Proctor, 1st Baronet (1722–1773) was an English politician. He served as a member of Parliament from Middlesex from 1747 to 1768. He was the first of the Proctor-Beauchamp baronets.
A political cartoon entitled "The Pageant, exhibiting the Characters of Despotism...", The Oxford Magazine, 1769; figure #18 is identified as "Sir W. B. P., Chief Mourner"