Town Hall Address 360 Elkwood Ave. New Providence, NJ 07974 United States- Union County Website http://www.newprov.org County Clerk 908-665-1400 360 Elkwood Ave. New Providence, NJ 07974 United States County Admin 908-665-1400 New Providence, NJ 07974 United States Assessor 908-665-8271 360 Elkwood Ave. New Providence, NJ 07974 United States Tax Collector 908-665-8031 360 Elkwood Ave. New Providence, NJ 07974 United States Attorney 908-757-7800 360 Elkwood Ave. New Providence, NJ 07974 United States Mayor 908-665-1400 360 Elkwood Ave. New Providence, NJ 07974 United States Municipal Court 609-758-7172 360 Elkwood Ave. New Providence, NJ 07974 United States County Union