Moline is a city located in Rock Island County, Illinois, United States, with a population of 50,792 in 2010. Moline is one of the Quad Cities, along with neighboring East Moline and Rock Island in Illinois and the cities of Davenport and Bettendorf in Iowa. The Quad Cities has a population of 379,690. The city is the ninth-most populated in Illinois, outside of the Chicago Metropolitan Area. The corporate headquarters of Deere & Company is located in Moline, as is Quad City International Airport, Black Hawk College, and the Quad Cities campus of Western Illinois University. Moline is a retail hub for the Illinois Quad Cities, as Southpark Mall and numerous big-box shopping plazas are located in the city.