Town Hall Address 549 Main Street Chatham, MA 02633 United States- Barnstable County Website http://www.chatham-ma.gov/ Town Clerk 508-945-5105 https://www.chatham-ma.gov/town-clerk United States Assessor 508-945-5103 https://www.chatham-ma.gov/assessing Mon-Fri: 8:00 to 4:00 549 Main Street Chatham, United States Tax Collector 508-945-5108 Mon-Fri: 8:00 to 4:00 549 Main Street Chatham, United States Fire District 508-945-2324 United States Water 508-945-5150 United States Town Hall Hours Mon-Fri: 8:00 to 4:00 County Barnstable