Town Hall Address 91 Newark-Pompton Tpke. Riverdale, NJ 07457 United States- Morris County Website https://www.riverdalenj.gov/ County Clerk 973-835-4060 Ext. 223 91 Newark-Pompton Tpke. Riverdale, NJ 07457 United States Assessor 973-835-4060 Ext. 234 Monday: 4:00 P.M. - 5:00 P.M. 91 Newark-Pompton Tpke. Riverdale, NJ 07457 United States Tax Collector 973-838-7208 Ext. 233 91 Newark-Pompton Tpke. Riverdale, NJ 07457 United States Attorney 973-835-0100 91 Newark-Pompton Tpke. Riverdale, NJ 07457 United States Mayor 973-835-4060 Ext. 215 91 Newark-Pompton Tpke. Riverdale, NJ 07457 United States Municipal Court 973-835-1013 Ext. 216 91 Newark-Pompton Tpke. Riverdale, NJ 07457 United States County Morris