Valhalla is a hamlet and census-designated place (CDP) that is located within the town of Mount Pleasant, New York, in Westchester County. Its population was 3,162 at the 2010 U.S. Census. The name of the community was inspired by a fan of the opera composer Richard Wagner, and the celebrated status of this hamlet comes primarily from its location as the burial places of the remains of numerous well-known people. The name comes from Valhalla, a heavenly abode in Norse mythology.