​CORUMBÁ, a town and river port of Brazil on the W. bank of the Paraguay river, 1986 m. above Buenos Aires and 486 m. above the Paraguayan frontier. Pop. (1890) 8414. Corumbá is a fortified military post, has the large Ladario naval arsenal, where small river boats are built and repaired, and is the commercial entrepôt of the state of Matto Grosso. It is near the Bolivian frontier and is strongly garrisoned. Although the climate is extremely hot, the neighbouring country has many large cattle farms. Corumbá is one of the most important places in the interior of Brazil.