Town Hall Address 255 Roseland Ave. Essex Fells, NJ 07021-0038 United States- Essex County Website http://www.essexfellsboro.com/ County Clerk 973-226-3400 Monday - Thursday: 9:00 A.M. - 5:00 P.M., Friday: 8:00 A.M. - 4:00 P.M. 255 Roseland Ave. Essex Fells, NJ 07021-0038 United States Assessor 973-226-3400 Tuesday: 3:30 P.M. - 5:30 P.M. 255 Roseland Ave. Essex Fells, NJ 07021-0038 United States Tax Collector 973-226-3400 255 Roseland Ave. Essex Fells, NJ 07021-0038 United States Attorney 973-226-3400 255 Roseland Ave. Essex Fells, NJ 07021-0038 United States Mayor 973-226-3400 255 Roseland Ave. Essex Fells, NJ 07021-0038 United States Municipal Court 973-228-6420 141 Gould Ave. North Caldwell, NJ 07006-4213 United States County Essex