It started out as a territory that was claimed by the Neponset Native American tribe. The Neponset tribe officially claimed the area that is now Walpole, and some of its surrounding territory, in 1635. The town of Dedham was not included in this claim, so they began to negotiate with the Neponset tribe to gain land. In 1636, a deal was made between the town of Dedham and the Neponsets to grant Dedham lands that now comprise the towns of Walpole, Norwood, Westwood, Medfield, Norfolk and Dover as well as Dedham. The land given to Dedham in this deal currently includes parts of 16 different towns.