Damariscove is an uninhabited island that is part of Boothbay Harbor in Lincoln County, Maine, United States, approximately 5 nautical miles (9.3 km) off the coast at the mouth of the Damariscotta River. The long, narrow island is approximately 2 miles (3.2 km) long and 1,500 feet (460 m) at its widest point. The island has served in the past as a fishing settlement and a United States Coast Guard life saving station.