Washington's Headquarters State Historic Site is a historic site in Newburgh, New York, USA. It consists of the Hasbrouck House, the longest-serving headquarters of George Washington during the American Revolutionary War, and three other structures. It is also the oldest house in the city of Newburgh, and the first property acquired and preserved by any U.S. state for historic reasons. For both that and its historic value it was designated a National Historic Landmark in 1961.