The Town of Westminster was a municipality established in 1988 from the former Westminster Township in Ontario. It was created as an attempt to prevent annexation with nearby London. The town was made up of numerous villages including Lambeth and Glanworth. Also, the municipality included the various commercial shopping malls along Wellington Road at Highway 401.
However, the Town of Westminster's life was short-lived. In the early 1990s, the City of London proposed a massive land annexation, which included the entire Westminster municipality.
In 1992, after months of political debates involving the Ontario government, the City of London, and local residents, the proposed annexation was allowed to proceed. On January 1, 1993, the Town of Westminster ceased to exist and most of it became part of the City of London. The rest was added to adjacent townships (Delaware Township to the west, South Dorchester Township to the east).