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QuickFacts

Cook County, Illinois

QuickFacts provides statistics for all states and counties, and for cities and towns with a population of 5,000 or more.

Chart

Population, percent change - April 1, 2020 (estimates base) to July 1, 2021, (V2021)

-4.0%
-3.0%
-2.0%
-1.0%
0.0%
1.0%
2.0%
3.0%
Cook County, Illinois
-1.9%
Adams County, Illinois
-1.2%
Alexander County, Illinois
-4.0%
Bond County, Illinois
-0.8%
Boone County, Illinois
-0.5%
Brown County, Illinois
2.8%
Bureau County, Illinois
-1.1%
Calhoun County, Illinois
-1.5%
Carroll County, Illinois
0.0%
Cass County, Illinois
-2.1%
Champaign County, Illinois
Z
Christian County, Illinois
-1.1%
Clark County, Illinois
-1.0%
Clay County, Illinois
-1.1%
Clinton County, Illinois
-0.3%
Coles County, Illinois
-0.2%
Crawford County, Illinois
-0.1%
Cumberland County, Illinois
-1.0%
De Witt County, Illinois
-1.1%
DeKalb County, Illinois
0.0%
Douglas County, Illinois
-0.1%
DuPage County, Illinois
-0.9%
Edgar County, Illinois
-2.1%
Edwards County, Illinois
-2.7%
Effingham County, Illinois
-0.7%
Fayette County, Illinois
-0.5%
Ford County, Illinois
-0.2%
Franklin County, Illinois
-1.0%
Fulton County, Illinois
-1.2%
Gallatin County, Illinois
-0.9%
Greene County, Illinois
-1.2%
Grundy County, Illinois
0.9%
Hamilton County, Illinois
-1.0%
Hancock County, Illinois
-1.2%
Hardin County, Illinois
Z
Henderson County, Illinois
-1.2%
Henry County, Illinois
-0.8%
Iroquois County, Illinois
-0.9%
Jackson County, Illinois
-0.8%
Jasper County, Illinois
-1.0%
Jefferson County, Illinois
-0.6%
Jersey County, Illinois
-0.8%
Jo Daviess County, Illinois
-0.4%
Johnson County, Illinois
1.2%
Kane County, Illinois
-0.2%
Kankakee County, Illinois
-0.8%
Kendall County, Illinois
2.3%
Knox County, Illinois
-1.4%
Lake County, Illinois
-0.4%
LaSalle County, Illinois
-0.6%
Lawrence County, Illinois
-0.8%
Lee County, Illinois
-0.3%
Livingston County, Illinois
-0.4%
Logan County, Illinois
Z
Macon County, Illinois
-1.5%
Macoupin County, Illinois
-1.2%
Madison County, Illinois
-0.5%
Marion County, Illinois
-0.9%
Marshall County, Illinois
-0.7%
Mason County, Illinois
-1.6%
Massac County, Illinois
-1.5%
McDonough County, Illinois
-1.5%
McHenry County, Illinois
0.3%
McLean County, Illinois
0.0%
Menard County, Illinois
-1.1%
Mercer County, Illinois
-0.7%
Monroe County, Illinois
-0.1%
Montgomery County, Illinois
-0.7%
Morgan County, Illinois
-0.9%
Moultrie County, Illinois
-0.1%
Ogle County, Illinois
-0.7%
Peoria County, Illinois
-1.3%
Perry County, Illinois
0.2%
Piatt County, Illinois
0.5%
Pike County, Illinois
-0.8%
Pope County, Illinois
0.4%
Pulaski County, Illinois
-2.5%
Putnam County, Illinois
-1.3%
Randolph County, Illinois
-0.1%
Richland County, Illinois
-0.1%
Rock Island County, Illinois
-1.2%
Saline County, Illinois
-1.9%
Sangamon County, Illinois
-0.8%
Schuyler County, Illinois
-0.9%
Scott County, Illinois
-2.3%
Shelby County, Illinois
-1.0%
St. Clair County, Illinois
-1.0%
Stark County, Illinois
-2.0%
Stephenson County, Illinois
-1.4%
Tazewell County, Illinois
-0.7%
Union County, Illinois
-1.9%
Vermilion County, Illinois
-1.5%
Wabash County, Illinois
-1.4%
Warren County, Illinois
-1.8%
Washington County, Illinois
-0.8%
Wayne County, Illinois
-1.3%
White County, Illinois
-0.7%
Whiteside County, Illinois
-0.7%
Will County, Illinois
0.1%
Williamson County, Illinois
-0.4%
Winnebago County, Illinois
-0.8%
Woodford County, Illinois
-0.6%
-4.0%
-3.0%
-2.0%
-1.0%
0.0%
1.0%
2.0%
3.0%
Value Notes

Estimates are not comparable to other geographic levels due to methodology differences that may exist between different data sources.

Some estimates presented here come from sample data, and thus have sampling errors that may render some apparent differences between geographies statistically indistinguishable. Click the Quick Info icon to the left of each row in TABLE view to learn about sampling error.

The vintage year (e.g., V2021) refers to the final year of the series (2020 thru 2021). Different vintage years of estimates are not comparable.

Users should exercise caution when comparing 2016-2020 ACS 5-year estimates to other ACS estimates. For more information, please visit the 2020 5-year ACS Comparison Guidance page.

Fact Notes Value Flags

QuickFacts data are derived from: Population Estimates, American Community Survey, Census of Population and Housing, Current Population Survey, Small Area Health Insurance Estimates, Small Area Income and Poverty Estimates, State and County Housing Unit Estimates, County Business Patterns, Nonemployer Statistics, Economic Census, Survey of Business Owners, Building Permits.

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