At around the same time as the Baldwin Act came into force, some of the townships that had been included in the Brock District were severed off to become parts of a new Brant County and a reconfigured Middlesex County. Norwich Township was divided into North and South in 1855. In the 1960s, the Ontario government began simplifying the structure of local government in select parts of the province, and the process reached Oxford County in 1975, when the number of separate township and village councils was reduced to the current five townships. Three urban municipalities also remained: Ingersoll, Tillsonburg, and Woodstock. The county boundaries were also enlarged to include the entire urban areas of Tavistock in the north and of Tillsonburg in the south.