Town Hall Address 400 Boulevard Mountain Lakes, NJ 07046 United States- Morris County Website https://mtnlakes.org/ County Clerk 973-334-3131 Ext. 2009 Monday - Friday: 8:30 A.M. - 4:30 P.M. 400 Boulevard Mountain Lakes, NJ 07046 United States Assessor 201-493-8520 400 Boulevard Mountain Lakes, NJ 07046 United States Tax Collector 973-334-3131 Ext. 2003 Monday - Friday: 8:30 A.M. - 4:30 P.M. 400 Boulevard Mountain Lakes, NJ 07046 United States Attorney 973-835-0100 400 Boulevard Mountain Lakes, NJ 07046 United States Mayor 973-334-3131 400 Boulevard Mountain Lakes, NJ 07046 United States Municipal Court 973-625-8300 Ext. 214 1 St. Mary's Pl. Denville, NJ 07834 United States Town Hall Hours 8:30-4:30, M-F County Morris