Town Hall Address 173 Main Street Groton, MA 01450 United States- Middlesex County Website http://www.townofgroton.org/ Town Clerk 978-448-1100 http://www.townofgroton.org/Town/TownDepartments/TownClerk.aspx United States Assessor 978-448-1127 http://www.townofgroton.org/Town/BoardsCommittees/BoardofAssessors/tabid/217/de… Mon: 8:00-4:00, Tues-Thurs: 8:00-4:00, Fri: 8:00-1:00 United States Tax Collector 978-448-1103 Mon: 8:00-7:00, Tues-Thurs: 8:00-4:00, Fri: 8:00-1:00 173 Main Street Groton, United States Fire District 978-448-6333 United States Water 978-448-1122 United States Town Hall Hours Mon: 8:00-4:00, Tues-Thurs: 8:00-4:00, Fri, 8:00-1:00 County Middlesex