Town Hall Address 51 Main St. Helmetta, NJ 08828 United States- Middlesex County Website http://www.helmettaboro.com County Clerk 732-521-4946 Ext. 100 Monday - Friday: 9:00 A.M. - 2:30 P.M. 51 Main St. Helmetta, NJ 08828 United States Assessor 732-521-4946 Ext. 102 Thursday: 5:10 P.M. - 6:10 P.M. 51 Main St. Helmetta, NJ 08828 United States Tax Collector 732-521-4946 Ext. 103 Thursday: 5:30 P.M. - 8:00 P.M. 51 Main St. Helmetta, NJ 08828 United States Attorney 732-972-3010 51 Main St. Helmetta, NJ 08828 United States Mayor 732-521-4946 Ext. 116 51 Main St. Helmetta, NJ 08828 United States Municipal Court 732-521-4946 51 Main St. Helmetta, NJ 08828 United States County Middlesex