William Williamson
William Williamson may refer to:
- William Williamson (American politician), US Representative
- William Williamson (Australian politician)
- William Crawford Williamson, English naturalist
- William D. Williamson, American, Governor of Maine, US Representative
- William Price Williamson, American officer in the U.S. Navy
- William Williamson (canoeist), Canadian canoeist
- William Richard Williamson, English adventurer and oil company representative
- William Williamson (priest, [born 1697)], Anglican priest in Ireland, Archdeacon of Kildare
- William Williamson (priest, born 1645), Irish Anglican priest, Archdeacon of Glendalough
- Willie Williamson, college football coach
- Bill Williamson, Australian jockey
- Bill Williamson (footballer), English footballer