GUALEGUAY, a town on the river of the same name in Argentina, 32 m. above the confluence of the Gualeguay river with the Ibucuy branch of the Parana, and about 120 m. N.N.W. of Buenos Aires. The port of Gualeguay is Puerto Ruiz, 5 tn. below, with which Gualeguay is connected by tramway. It is also on a branch of the Entre Rios railway. It is a stock-raising centre, its establishment dating from 1783. Pop. (192 5) 16,485. The town has a meat-chilling plant, tanneries, shoe factories, soap factories and flour mills. Wheat, maize and flax-seed are produced in the tributary region. Gualeguay is to be distinguished from Gualeguaychu, which is some So m. north-east.