Find schools and get information on the program that’s right for you.
Powered by Campus Explorer
Rock Island County is a county located in the state of Illinois, bounded on the west by the Mississippi River. According to the 2010
census, it had a population of 147,546. Rock Island
County was created on February 9, 1831.The county
seat is Rock Island. The county is named
for rock island in the Mississippi River.
Rock Island County is one of the four counties that make up the Davenport-Moline-Rock Island, IA-IL Metropolitan Statistical Area.
The county is named for a rock island in the Mississippi River.
County QuickFacts: CensusBureau Quick Facts
Rock Island County was created on February 9, 1831 (Laws, 1831, p. 52) and was formed from Jo Daviess County. County
organization was completed in 1833. Present area, or parts of it, formerly included in: Attached to JoDaviess County
[Laws, 1831, p. 53] (1831-1833), JoDaviess County (1827-1831), Mercer County (1825-1827), Henry County (1825-1827), Pike
County (1821-1825), Fulton County (1823-1825), Madison County (1812-1821) and St. Clair County (1794-1812).
The County was named for rock island of that name in the Mississippi. The County Seat is Rock Island . Prior County Seats was Farnhamsburg- House of John Barrell [temporary designation] (1833-1835), Stephenson- Name changed to Rock Island in 1841 (1835-1841) and Rock Island (1841-Present).
As reported by the Census Bureau, the county has a total area of 451 square miles (1,168 km2), of which, 427 square miles (1,105 km2) of it is land and 24 square miles (63 km2) of it (5.41%) is water.
Rock Island county is located in northwest Illinois. Part of the
Upper Mississippi River National Wildlife and Fish Refuge is located in
Bordering counties are as follows: