Bradford West Gwillimbury is a town in south-central Ontario, in the County of Simcoe in the Toronto Census Metropolitan Area on the Holland River. West Gwillimbury takes its name from the family of Elizabeth Simcoe, née Gwillim. The former Town of Bradford was amalgamated with portions of the former Townships of West Gwillimbury and Tecumseth to become the Town of Bradford West Gwillimbury on January 1, 1991.