Town Hall Address 106 Brown Ave. Prospect Park, NJ 07508 United States- Passaic County Website http://www.prospectpark.net County Clerk 973-790-7902 Ext. 510 106 Brown Ave. Prospect Park, NJ 07508 United States County Admin 973-790-7902 Ext. 532 Prospect Park, NJ 07508 United States Assessor 973-790-7902 Ext. 525 Wednesday By Appointment Only 106 Brown Ave. Prospect Park, NJ 07508 United States Tax Collector 973-790-7902 Ext. 517 106 Brown Ave. Prospect Park, NJ 07508 United States Attorney 973-301-0001 106 Brown Ave. Prospect Park, NJ 07508 United States Mayor 973-790-7902 Ext. 519 106 Brown Ave. Prospect Park, NJ 07508 United States Municipal Court 973-790-7902 Ext. 527 106 Brown Ave. Prospect Park, NJ 07508 United States County Passaic