The Quad Cities, in order of descending population, are:īefore World War II, the area was known as the “ Tri-Cities“, and included only Davenport, Rock Island, and Moline.
The July 1, 2007, population of the four-county metropolitan area is estimated at 376,160. The Quad Cities actually consists of five neighboring cities flanking the Mississippi River in Iowa and Illinois in the Midwestern United States.
