SACO, is a city in southern Maine, in York county, across the Saco River from Biddeford, about 15 miles (24 km) south of Portland. Its industries make textile products, shoes, rawhide products, and clothing. The York Institute Museum has a finearts collection. Thornton Academy (coeducational) was founded in 1811.
Saco and Biddeford were both settled in 1630. The communities were called Saco until 1718 and Biddeford until 1762. Saco was renamed Pepperellboro, but resumed its original name in 1805. It was chartered in 1867 and has a mayor and board of aldermen.