Putnam Valley is a town in Putnam County, New York, United States. The population was 11,809 at the 2010 census. Its location is northeast of New York City, in the southwest part of Putnam County.
The retreating glaciers of the last ice age did much to shape the landscape of Putnam Valley, including the shearing of hills to expose springs (creating, for example Bryant Pond) and leaving the glacial deposits of stone and large boulders. The current area of Putnam Valley was occupied by paleo-Indians followed by the historic Wappinger Indians who lived by the many lakes.In 1697, the Highland Patent was granted to Adolph Philipse. The first settlers, the Shulman family among them, arrived around 1740. In 1745 the Smith property was sold to the Bryant family, who renamed their pond Bryant Pond and the nearby hill, Bryant Hill. The Smith family homestead is the oldest house in Putnam Valley, located just east of the Taconic Parkway on Bryant Pond Road.Putnam Valley incorporated in 1839 as the town of Quincy, when it was separated from the town of Philipstown, and it took the name "Putnam Valley" in 1840 as a result of inhabitants being unfavorably impressed with John Quincy Adams.In 1861, a small part of the town of Carmel was added to Putnam Valley.