Town Hall Address 355 North Ave. Dunellen, NJ 08812-1053 United States- Middlesex County Website http://dunellen-nj.gov/ County Clerk 732-969-3033 355 North Ave. Dunellen, NJ 08812-1053 United States County Admin 732-969-3033 355 North Ave. Dunellen, NJ 08812-1053 United States Assessor 732-969-3323 355 North Ave. Dunellen, NJ 08812-1053 United States Tax Collector 732-968-1226 355 North Ave. Dunellen, NJ 08812-1053 United States Attorney 732-356-1234 355 North Ave. Dunellen, NJ 08812-1053 United States Mayor 732-968-3033 355 North Ave. Dunellen, NJ 08812-1053 United States Municipal Court 732-968-3400 355 North Ave. Dunellen, NJ 08812-1053 United States Town Hall Hours 9 am -- 4:30pm County Middlesex