About the town » Stewartsville, Warren County, New Jersey, United States

Stewartsville is an unincorporated community within Greenwich Township in Warren County, New Jersey, United States. The area is served as United States Postal Service ZIP code 08886. As of the 2000 United States Census, the population for ZIP Code Tabulation Area 08886 was 4,854. The Kennedy House and Mill, located on Route 173 is listed on the National Register of Historic Places .