William Oliphant may refer to:
- William Oliphant (died aft. 1313), Governor of Sterling 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
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