Town Hall Address 1353 Main St. Millstone, NJ 08844 United States- Somerset County Website http://www.millstoneboro.org/ County Clerk 908-281-6893 1353 Main St. Millstone, NJ 08844 United States Assessor 908-281-6893 1353 Main St. Millstone, NJ 08844 United States Tax Collector 908-281-6893 1353 Main St. Millstone, NJ 08844 United States Attorney 908-722-0700 1353 Main St. Millstone, NJ 08844 United States Mayor 908-281-5783 1353 Main St. Millstone, NJ 08844 United States Municipal Court 732-873-7285 495 DeMott Ln. Somerset, NJ 08873 United States County Somerset