Town Hall Address 1976 Morris Ave. Union, NJ 07083-3579 United States- Union County Website https://www.uniontownship.com/ County Clerk 908-851-8501 1976 Morris Ave. Union, NJ 07083-3579 United States Assessor 908-851-8505 1976 Morris Ave. Union, NJ 07083-3579 United States Tax Collector 908-851-8508 1976 Morris Ave. Union, NJ 07083-3579 United States Attorney 908-623-3676 1976 Morris Ave. Union, NJ 07083-3579 United States Mayor 908-623-3676 1976 Morris Ave. Union, NJ 07083-3579 United States Municipal Court 908-851-5400 981 Caldwell Ave. Union, NJ 07083-6797 United States County Union