Town Hall Address 807 Mill River Southfield Road Mill River, MA 01244 United States- Berkshire County Website http://www.newmarlboroughma.gov/ Town Clerk 413-229-8278 http://www.newmarlboroughma.gov/Pages/NewMarlboroughMA_Clerk/index United States Assessor 413-229-8926 http://www.newmarlboroughma.gov/Pages/NewMarlboroughMA_Bcomm/Assessor/index Mon-Thurs: 8:00-1:00 P.O. Box 99, Mill River, MA, 01244 United States Tax Collector 413-229-8963 P.O. Box 220, Mill River, MA 01244 United States Fire District 413-229-8165 United States County Berkshire