Bay Island is a small island located halfway down Balboa Peninsula in Newport Beach, California. It is the only island in the Newport Beach harbor islands that does not allow car traffic. The island is accessible via a small bridge that will only accommodate golf carts. The island is not accessible to the public by land, though public access to its beaches is protected by the California Constitution. It has 23 residences, a botanical garden, courtyard garden, tennis court, and several beaches.