"Fort Decker" is a stone house built in 1793 from the remains of the fort of that name. It is located on West Main Street in Port Jervis, New York, the oldest building in that city, which it predates by several decades. The original Fort Decker was built by a Frederick Haynes, a Dutch settler, sometime before 1760, during the French and Indian War, as an unofficial defense and trading post. It was one and a half stories high, built of stone and overlapping logs. Haynes left the area for New Jersey around 1775, leaving the fort to his wife's family, the Deckers.