William Oliphant may refer to:
William Oliphant (died after 1313), Governor of Stirling Castle during the Wars of Scottish Independence William Oliphant, Lord of Aberdalgie (died 1329), Scottish knight during the Wars of Scottish Independence William Oliphant, Lord Newton (1551–1628), Scottish judge William Oliphant, Sr. (1893–1947), founder of Oliphant's Gym, believed to be the oldest gym in North America William J. Oliphant (1845–1930), American photographer