Town Hall Address 380 Hillsdale Ave. Hillsdale, NJ 07642-2794 United States- Bergen County Website http://www.hillsdalenj.org County Clerk 201-666-4800 Ext. 1552 380 Hillsdale Ave. Hillsdale, NJ 07642-2794 United States Assessor 201-666-4800 Ext. 1561 380 Hillsdale Ave. Hillsdale, NJ 07642-2794 United States Tax Collector 201-666-4800 Ext. 1501 380 Hillsdale Ave. Hillsdale, NJ 07642-2794 United States Attorney 201-385-3788 380 Hillsdale Ave. Hillsdale, NJ 07642-2794 United States Mayor 201-666-4800 380 Hillsdale Ave. Hillsdale, NJ 07642-2794 United States Municipal Court 201-666-4800 380 Hillsdale Ave. Hillsdale, NJ 07642-2794 United States County Bergen