Town Hall Address 2 W. Main St. Mendham, NJ 07945 United States- Morris County Website http://www.mendhamnj.org County Clerk 973-543-7152 Ext. 15 Monday - Friday: 9:00 A.M. - 4:30 P.M. 2 W. Main St. Mendham, NJ 07945 United States County Admin 973-543-7152 Ext. 11 Mendham, NJ 07945 United States Assessor 973-543-7152 Ext. 13 Monday: 9:00 A.M. - 1:00 P.M. 2 W. Main St. Mendham, NJ 07945 United States Tax Collector 973-543-7152 Ext. 17 Tuesday & Friday: 9:00 A.M. - 4:30 P.M. 2 W. Main St. Mendham, NJ 07945 United States Attorney 973-334-1900 2 W. Main St. Mendham, NJ 07945 United States Mayor 973-543-7152 Ext. 15 2 W. Main St. Mendham, NJ 07945 United States Municipal Court 908-879-3660 Ext. 2126 50 North Rd. Chester, NJ 07930 United States County Morris