Cinqueux is a commune in the Oise department in northern France. The residents of Cinqueux are called Cinquatiens and Cinquatiennes. Cin…Cinqueux is a commune in the Oise department in northern France. The residents of Cinqueux are called Cinquatiens and Cinquatiennes. Cinqueux has a population of 1 541 as of 2016, an estimate from the National Institute of Statistics ad Economic Studies Insee.