Williamstown or Williamtown is the name of several places in the world:
Australia Williamtown, New South Wales RAAF Base Williamtown, New South Wales Williamstown, South Australia Williamstown, Victoria Williamstown railway line Williamstown railway station Williamstown Beach railway station Williamstown, Western Australia, a suburb of Kalgoorlie Electoral district of Williamstown, an electoral district in Victoria
Cameroon Williamstown, Bimbia, a historical village in the kingdom of Bimbia, now no longer in existence
Canada Williamstown, Ontario the historical name of Strange, Ontario
Ireland a townland in Ballyloughloe civil parish, barony of Clonlonan, County Westmeath an area of Blackrock, Dublin Williamstown, County Galway, a village Williamstown, County Limerick, a townland Williamstown, County Roscommon a townland in Foyran civil parish, barony of Fore, County Westmeath a townland in Mayne civil parish, barony of Fore, County Westmeath a townland in Piercetown civil parish, barony of Rathconrath, County Westmeath
United Kingdom Williamstown, Rhondda Cynon Taf, Wales
United States Williamstown, Indiana Williamstown, alternative name for Frytown, Iowa Williamstown, Kansas Williamstown, Kentucky Williamstown, Massachusetts, a New England town Williamstown (CDP), Massachusetts, the main village in the town Williamstown, New Jersey Williamstown, New York Williamstown, Ohio Williamstown, Pennsylvania Williamstown, Vermont, a New England town Williamstown (CDP), Vermont, the main village in the town Williamstown, West Virginia Williamstown, Wisconsin Williamstown Township, Michigan
See also Williamston (disambiguation) Williamson (disambiguation)