Where is Warren County, Illinois?

location of Warren county on a map — Location of Warren County within the state of Illinois

Warren County is a county equivalent area found in Illinois, USA. The county government of Warren is found in the county seat of Monmouth.

With a total 1,406.5 sq. km of land and water area, Warren County, Illinois is the 2028th largest county equivalent area in the United States. Home to 17,874 people, Warren County has a total 7662 households earning 43536 on average per year.

Warren County, Illinois - Quick Facts

FIPS Code	17187
Area Codes	309
Time Zone	CST
Major Cities	Monmouth (population: 11,656), Roseville (population: 1,669), Kirkwood (population: 922), Little York (population: 774), Cameron (population: 682), Smithshire (population: 289), Berwick (population: 259), Gerlaw (population: 116)
Land Area	6,901 sq miles
Water Area	542 sq miles
Household Income	$43,536
Housing Units	7,662
Median Home Value	$81,500
High School Grads	88% of population
Holders of Bachelors Degrees	21% of population
Retail Spending	$7,602 per capita
Food & Accomodation Sales	$14,251 per capita