Rock Island County
Rock Island County, Illinois
Rock Island, IL 61201
Phone: (309) 786-4451
www.co.rock-island.il.us
On the northwestern border of IL; organized Feb 9, 1831 from Jo Daviess County. Name Origin: For an island in the Mississippi River near the mouth of the Rock River
Area (sq mi):: 451.16 (land 426.75; water 24.40) Population per square mile: 346.40
Population 2005: 147,808 State rank: 14 Population change: 2000-20005 -1.00%; 1990-2000 0.40% Population 2000: 149,374 (White 81.50%; Black or African American 7.50%; Hispanic or Latino 8.60%; Asian 1.00%; Other 6.00%). Foreign born: 4.60%. Median age: 37.80
Income 2000: per capita $20,164; median household $38,608; Population below poverty level: 10.70% Personal per capita income (2000-2003): $26,716-$27,695
Unemployment (2004): 5.60% Unemployment change (from 2000): 0.20% Median travel time to work: 18.70 minutes Working outside county of residence: 24.30%
![]() |
See other counties in Illinois.