Town Hall Address 39 Washington Ave. Milltown, NJ 08850-1219 United States- Middlesex County Website http://www.milltownnj.org County Clerk 732-828-2100 Ext. 181 39 Washington Ave. Milltown, NJ 08850-1219 United States County Admin 732-828-2100 Ext. 180 Milltown, NJ 08850-1219 United States Assessor 732-828-2100 Ext. 142 Tuesday: 6:00 P.M. 39 Washington Ave. Milltown, NJ 08850-1219 United States Tax Collector 732-828-2100 Ext. 129 39 Washington Ave. Milltown, NJ 08850-1219 United States Attorney 732-356-1243 39 Washington Ave. Milltown, NJ 08850-1219 United States Mayor 732-828-2100 Ext. 123 39 Washington Ave. Milltown, NJ 08850-1219 United States Municipal Court 732-247-3936 39 Washington Ave. Milltown, NJ 08850-1219 United States County Middlesex