The Douglass House is a historic house currently located at the corner of Front and Montgomery Streets in the Mill Hill neighborhood of the city Trenton in Mercer County, New Jersey. It served as George Washington's headquarters prior to the Battle of Princeton on January 3, 1777. Listed as the Bright–Douglass House, it was documented by the Historic American Buildings Survey in 1936, when the house was located in Mahlon Stacy Park near the Delaware River. It was added to the National Register of Historic Places on December 18, 1970, for its significance in architecture, military and social history. It was added as a contributing property to the Mill Hill Historic District on December 12, 1977.

Originally located on South Broad Street, the oldest section of the house dates to c. 1766. It was built by Jacob Bright, who sold it to Alexander Douglass, a quartermaster in the Continental Army, in 1769. As of 2017, the house was undergoing extensive renovation.

• List of Washington's Headquarters during the Revolutionary War
• List of the oldest buildings in New Jersey
• National Register of Historic Places listings in Mercer County, New Jersey

• Media related to Douglass House at Wikimedia Commons
• Historic American Buildings Survey (HABS) No. NJ-237, "Bright–Douglass House, Mahlon Stacy Park, Trenton, Mercer County, NJ"
• "Alexander Douglass House on the Move". The Historical Marker Database.