Who is a member?
Our members are the local governments of Massachusetts and their elected and appointed leadership.
State and community geography
State land area: 8,257 square miles (ranking 45th of the 50 states)
Largest body of water: Quabbin Reservoir (39 square miles)
Longest river: Charles River (80 miles)
Highest elevation: Mount Greylock (3,491 feet)
Lowest elevation: Atlantic Ocean (sea level)
Shoreline: 192 miles (not including islands)
Five largest communities (in square miles):
• Plymouth: 97.57
• Middleborough: 69.98
• Dartmouth: 60.91
• Barnstable: 60.17
• Petersham: 54.27
Five smallest communities (in square miles)
• Nahant: 1.04
• Winthrop: 1.56
• Chelsea: 1.86
• Hull: 2.43
• Swampscott: 3.08
Average community land area: 22.33 square miles
Counties: 14