Great Diamond Island is an island in Casco Bay, Maine. It is part of the city of Portland, Maine.
You won't see a lot of moving trucks zipping renters in and out of Great Diamond Island, since most homes are resided in by their owners. There is no shortage of college-educated people who are occupying the homes in this city, as the percentage is high. Great Diamond Island is the perfect place for you if you are thinking of settling down with your special someone since the residents are mainly married couples.