New Carthage, Louisiana, also known as Carthage Landing, was a 19th-century Mississippi River boat landing and village surrounded by cotton-producing agricultural land and undeveloped wetlands. New Carthage was located in, successively, Concordia Parish, Madison Parish, and Tensas Parish in Louisiana, United States. Destroyed by a combination of the American Civil War and the power of the Mississippi River, nothing remains of New Carthage today.