Moline is a city located in Rock Island County, Illinois, United States. With a population of 43,977 in 2010, it is the largest city in Rock Island County. It 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. Moline is also a retail hub for the Illinois Quad Cities, as South Park Mall and numerous big-box shopping plazas are located in the city.

In the mid-1990s, the city undertook major efforts to revitalize its central business district, which had declined after suburban growth and retail changes after the 1950s and 1960s. Today, Moline's downtown again serves as one of the civic and recreational hubs of the Quad Cities; many events take place at the 12,000-seat iWireless Center (formerly known as The MARK of the Quad Cities) and at John Deere Commons. Downtown Moline features hotels such as Radisson and Stoney Creek Inn, and commercial areas such as Bass Street Landing and the historic 5th Avenue.