The William Trent House is a historic building located at 15 Market Street in Trenton, Mercer County, New Jersey. It was built in 1719 for William Trent and is the oldest building in Trenton. He founded the eponymous town, which became the capital of New Jersey. It has served as the residence for three Governors. The house was added to the National Register of Historic Places and listed as a National Historic Landmark on April 15, 1970, for its significance as an example of Early Georgian Colonial architecture.