PORTO ALEGRE, a town of Brazil, in the province of Sao Pedro do Rio Grande do Sul, stands on the Jacuhy, near its mouth in Lake Patos, 150 miles N.N.W. of Rio Grande. It is regularly and well built, and contains several churches, a custom-house, hospital, lyceum and other schools. The harbour is much frequented by merchantmen, and an active trade is carried on. Pop., with the suburbs, 12,000.