Machias Bay
Machias Bay
Machias Bay
Machias Bay
Machias Bay
LocationWashington County, Maine, United States
Coordinates44°38′N 67°20′W / 44.64°N 67.33°W / 44.64; -67.33Coordinates: 44°38′N 67°20′W / 44.64°N 67.33°W / 44.64; -67.33
Part ofGulf of Maine
River sourcesMachias River
Max. length7 miles (11 km)
Max. width4 miles (6.4 km)
Surface elevation0 feet (0 m)
IslandsCross Island
SettlementsMachias, Machiasport

Machias Bay is a bay in Washington County, Maine that opens into the Gulf of Maine.[1] The bay was the scene of the Battle of Machias — the first naval battle of the American Revolution, occasioned by the British need for lumber for Boston.[2]

Located at the mouth of the Machias River between the towns of Machiasport, Machias, East Machias, Whiting, and Cutler, it is separated from Little Machias Bay to the east by the Cutler Peninsula, from Little Kennebec Bay to the west by the Point of Maine, and from the Gulf of Maine to the south by Cross Island and the Libby Islands.

The bay extends roughly 7 mi. (12 km) and is 4 mi. (6 km) at its widest.


  1. ^ "Report for Machias Bay". USGNIS. Retrieved 26 December 2017.
  2. ^ Maine League of Historical Societies and Museums (1970). Doris A. Isaacson (ed.). Maine: A Guide 'Down East'. Rockland, Me: Courier-Gazette, Inc. pp. 280–281.