Town Hall Address 110 E. Westfield Ave. Roselle Park, NJ 07204-2038 United States- Union County Website http://rosellepark.net/ County Clerk 908-245-6222 110 E. Westfield Ave. Roselle Park, NJ 07204-2038 United States Assessor 908-245-2540 Friday: 8:30 A.M. - 4:30 P.M. 110 E. Westfield Ave. Roselle Park, NJ 07204-2038 United States Tax Collector 908-245-0819 110 E. Westfield Ave. Roselle Park, NJ 07204-2038 United States Attorney 908-245-6222 110 E. Westfield Ave. Roselle Park, NJ 07204-2038 United States Mayor 908-245-6180 110 E. Westfield Ave. Roselle Park, NJ 07204-2038 United States Municipal Court 908-241-4631 110 E. Westfield Ave. Roselle Park, NJ 07204-2038 United States Town Hall Hours Monday - Friday: 8:30 A.M. - 4:30 P.M. County Union