The Piatt Castles, built by brothers Donn and Abram S. Piatt in the 1860s and 1870s, are two chateaux built in a Gothic design, located 1 mi (1.6 km) and 1.75 mi (2.82 km) east of the village of West Liberty in Logan County, Ohio, United States. They are open to the public. In 1982, the Castles were listed on the National Register of Historic Places.