Town Hall Address 375 Millburn Ave. Millburn, NJ 07041-1379 United States- Essex County Website http://www.twp.millburn.nj.us County Clerk 973-564-7073 375 Millburn Ave. Millburn, NJ 07041-1379 United States County Admin 973-564-7075 Millburn, NJ 07041-1379 United States Assessor 973-564-7081 Monday - Wednesday: 8:30 A.M. - 4:30 P.M. 375 Millburn Ave. Millburn, NJ 07041-1379 United States Tax Collector 973-564-7083 375 Millburn Ave. Millburn, NJ 07041-1379 United States Attorney 973-912-9008 375 Millburn Ave. Millburn, NJ 07041-1379 United States Mayor 973-564-7075 375 Millburn Ave. Millburn, NJ 07041-1379 United States Municipal Court 973-564-7066 435 Essex St. Millburn, NJ 07041-1380 United States Town Hall Hours Monday - Friday: 8:30 A.M. - 4:30 P.M. County Essex