Town Hall Address 1000 Route 10. P.O. Box 250 Whippany, NJ 07981-0250 United States- Morris County County Clerk 973-428-2467 1000 Route 10. P.O. Box 250 Whippany, NJ 07981-0250 United States County Admin 973-428-2467 P.O. Box 250 Whippany, NJ 07981-0250 United States Assessor 973-428-2494 Tuesday & Thursday 1000 Route 10. P.O. Box 250 Whippany, NJ 07981-0250 United States Tax Collector 973-428-2480 1000 Route 10. P.O. Box 250 Whippany, NJ 07981-0250 United States Attorney 973-334-1900 1000 Route 10. P.O. Box 250 Whippany, NJ 07981-0250 United States Mayor 973-428-2467 1000 Route 10. P.O. Box 250 Whippany, NJ 07981-0250 United States Municipal Court 973-428-2519 1000 Route 10 Whippany, NJ 07981 United States Town Hall Hours Monday - Thursday: 8:00 A.M. - 4:30 P.M., Friday: 8:00 A.M. - 1:00 P.M. County Morris