 Bridgewater Township was formed in November 1806 from parts of Tunkhannock, Braintrim, Nicholson, and Rush Townships in what was then northern Luzerne County.The Borough of Montrose was incorporated from part of Bridgewater Township in 1824.According to the United States Census Bureau, the township has a total area of , of which, of it is land and of it (0.82%) is water.