Mount Desert Island
| Geography | |
|---|---|
| Location | Atlantic Ocean |
| Coordinates | 44°20′34″N 68°18′26″W / 44.342827°N 68.307138°W |
| Area | 108 sq mi (280 km2) |
| Highest elevation | 466 m (1,528 ft) |
| Highest point | Cadillac Mountain |
| Administration | |
United States | |
| State | Maine |
| County | Hancock County |
| Largest settlement | Bar Harbor (pop. 5,235 people in 2010) |
| Demographics | |
| Population | 10,615 (2000) |
| Pop. density | 96.8/sq mi (37.37/km2) |
| Ethnic groups | mainly Caucasian |
Mount Desert Island (MDI; French: Île des Monts Déserts) in Hancock County, Maine, is the largest island off the coast of Maine. With an area of 108 square miles (280 km2) it is the 52nd-largest island in the United States, the sixth-largest island in the contiguous United States, and the second-largest island on the Eastern Seaboard, behind Long Island and ahead of Martha's Vineyard. According to the 2010 census, the island has a year-round population of 10,615. In 2017, an estimated 3.5 million tourists visited Acadia National Park on MDI. The island is home to numerous well-known summer colonies such as Northeast Harbor and Bar Harbor.