Boon Island is a small, rocky island located off the coast of Maine, in the United States. It is part of the Boon Island Light and is known for its lighthouse, which was first built in 1855. The island is uninhabited and is primarily a site for birdwatching and marine life observation. The island is approximately 1.5 acres in size and is situated about 6 miles from York, Maine. Boon Island is often visited by boaters and is a popular spot for those interested in lighthouse history and coastal ecology. Its rugged landscape and scenic views make it a unique destination.