The town was first settled around 1720 in The Oblong, which was a disputed area in southeastern Province of New York also claimed by the Connecticut Colony. The Oblong was a strip of land approximately 2.9 km wide between Dutchess County, New York, and Connecticut, ceded to New York in the 1731 Treaty of Dover. Between 1720 and 1776 a large number of mostly Connecticut families settled in the southern Oblong. They could not settle west of it because that land was privately owned by the Philipse Family. It had been granted a patent for virtually all of the remainder of the area of the future Putnam County.