🇺🇸 Saco is a city in York County, Maine, United States. It is home to Ferry Beach State Park, Funtown Splashtown USA, Thornton Academy, as well as General Dynamics Armament Systems (also known by its former name, Saco Defense), a subsidiary of the defense contractor General Dynamics. Saco sees much tourism during summer months due to its amusement parks, Ferry Beach State Park, and proximity to Old Orchard Beach.
Saco is part of the Portland–South Portland–Biddeford, Maine metropolitan statistical area. Saco's twin-city is Biddeford.
Saco has a population of over 20,381 people. Saco also forms part of the wider Portland-South Portland-Biddeford metropolitan area which has a population of over 623,365 people.