Penobscot Bay originates from the mouth of Maine's Penobscot River. There are many islands in this bay, and on them, some of the country's most well-known summer colonies. The bay served as portal for the one time "lumber capital of the world," namely; the city of Bangor. Both the bay and the river that feeds it are named after the native tribes that once called the entire river their home.

Islands in Penobscot Bay

• Isle au Haut
• Islesboro
• North Haven
• Vinalhaven
• Sears Island
• Great Spruce Head