Old Orchard Beach is a town and census-designated place (CDP) in York County, Maine, United States. The population was 8,856 at the 2000 census. It is part of the Portland–South Portland–Biddeford, Maine Metropolitan Statistical Area. Located on the inner side of Saco Bay on the Atlantic Ocean, the town is a popular summer beach destination. The downtown contains many tourist-oriented businesses, including clam shacks and t-shirt shops.