Céu Azul is a municipality in the state of Paraná in the Southern Region of Brazil. Céu Azul covers 1,179.5 square kilometres, has a population of 11,819, and population density of 9.35 resident per square kilometer. 852 square kilometres of the city is preserved as Atlantic Forest and is part of Iguaçu National Park. The western region of Paraná was the target of logging companies in the 1950s.