Quad Cities metropolitan area
The Quad Cities metropolitan area, more formally known as the Davenport–Moline–Rock Island Metropolitan Statistical Area, is the metropolitan area associated with the Quad Cities in the U.S. states of Iowa and Illinois. The area consists of the cities of Davenport and Bettendorf in Iowa and Rock Island, Moline, and East Moline in Illinois, and their suburbs in northwest Illinois and southeast Iowa. The Quad Cities metropolitan area is also considered part of the Great Lakes Megalopolis, and is the largest metropolitan area along the Mississippi River in Iowa and between Minneapolis–Saint Paul and  the St. Louis metropolitan area. The Davenport–Moline–Rock Island Metropolitan Statistical Area consists of four counties: Scott County in Iowa and Henry, Mercer, and Rock Island counties in Illinois. The MSA had an estimated population of 383,681 as of 2013, and the CSA had a population of 474,937, making it the 90th largest CSA in the nation.