Constantina, Rio Grande do Sul  Constantina, Rio Grande do Sul is a municipality in the state of Rio Grande do Sul, Brazil. Founded April 14, 1959. The municipality's motto is "Celeiro da Hospitalidade", meaning "Barn Hospitality". It is a municipality that is part of the microregion of Frederico Westphalen. It is located at latitude 27º44'05 "South and longitude 52º59'32" West, with an altitude of 501 meters. It has an area of 278.54 km² and its estimated population in 2004 was 9,545 inhabitants.