Town Hall Address 3003 Belvidere Rd. Phillipsburg, NJ 08865 United States- Warren County Website http://www.harmonytwp-nj.gov/ County Clerk 908-213-1600 Ext. 10 Monday - Friday: 9:00 A.M. - 4:00 P.M. 3003 Belvidere Rd. Phillipsburg, NJ 08865 United States Assessor 908-213-1600 Ext. 13 Monday: 4:30 P.M. - 6:30 P.M. 3003 Belvidere Rd. Phillipsburg, NJ 08865 United States Tax Collector 908-213-1600 Ext. 16 Tuesday: 9:00 A.M. - 1:00 P.M. 3003 Belvidere Rd. Phillipsburg, NJ 08865 United States Attorney 908-852-2600 1001 Route 517 Hackettstown, NJ 07840 United States Mayor 908-213-1600 Ext. 10 1001 Route 517 Hackettstown, NJ 07840 United States Municipal Court 908-475-5331 Ext. 108 691 Water St. Belvidere, NJ 07823 United States County Warren