Catawba Island [1] is part of the Ottawa County peninsula. Catawba Island is one of 12 townships that make up Ottawa County, Ohio.It is commonly referred to as Catawba and Catawba Island, although it is a not an island as its name implies. Ottowa City General Store, 4057 NW Catawba Road, Port Clinton, OH 43452 (South-West about .5 mile from the Miller Ferry on Catawba Island, around the bend on Rt.53).