Bar Harbor is a town on Mount Desert Island in Hancock County, Maine, United States. As of the 2010 census, its population is 5,235. Bar Harbor is a popular tourist destination in the Down East region of Maine and home to the College of the Atlantic, Jackson Laboratory, Bar Harbor Bank & Trust, and MDI Biological Laboratory. Until a catastrophic fire in 1947, the town was a noted summer colony for the wealthy. Bar Harbor is home to the largest parts of Acadia National Park, including Cadillac Mountain, the highest point within twenty-five miles of the coastline of the Eastern United States. The town is served by the Hancock County-Bar Harbor Airport, which provides year-round direct flights to Boston, Massachusetts.