 While it is in the New Windsor ZIP Code, it is located off NY 94 just inside the Cornwall town line.Two of Cornwall's elementary schools (Willow Avenue and Cornwall-on-Hudson) and the current middle school have served as the district's high school in the past.However, by the late 1990s, with Cornwall's booming population, it was clear that a new building was necessary for the upper grades, and the district sought to build a new high school.