Please note that new Connecticut county and township level geographies are not available within the map.

U.S. flag

An official website of the United States government


QuickFacts

Mercer County, Illinois; Lake County, Illinois; Williamson County, Illinois; Sangamon County, Illinois; DuPage County, Illinois; McHenry County, Illinois

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

Table

Mercer County, Illinois
Lake County, Illinois
Williamson County, Illinois
Sangamon County, Illinois
DuPage County, Illinois
McHenry County, Illinois
Female persons, percent
49.4%
49.6%
49.6%
51.7%
50.4%
49.8%
People
Population
Population estimates, July 1, 2023, (V2023)
15,487
708,760
66,706
193,491
921,213
312,800
Population Estimates, July 1, 2022, (V2022)
15,533
709,899
66,544
194,151
921,664
311,558
Population estimates base, April 1, 2020, (V2023)
15,698
714,336
67,152
196,341
932,884
310,213
Population estimates base, April 1, 2020, (V2022)
15,698
714,336
67,152
196,341
932,884
310,213
Population, percent change - April 1, 2020 (estimates base) to July 1, 2023, (V2023)
-1.3%
-0.8%
-0.7%
-1.5%
-1.3%
0.8%
Population, percent change - April 1, 2020 (estimates base) to July 1, 2022, (V2022)
-1.1%
-0.6%
-0.9%
-1.1%
-1.2%
0.4%
Population, Census, April 1, 2020 15,699 714,342 67,153 196,343 932,877 310,229
Population, Census, April 1, 2010 16,434 703,462 66,357 197,465 916,924 308,760
Age and Sex
Persons under 5 years, percent
4.7%
5.2%
5.2%
5.6%
5.4%
5.2%
Persons under 18 years, percent
20.7%
22.9%
21.2%
21.7%
21.8%
22.4%
Persons 65 years and over, percent
22.1%
16.1%
20.2%
19.5%
17.6%
16.7%
Female persons, percent
49.4%
49.6%
49.6%
51.7%
50.4%
49.8%
Race and Hispanic Origin
White alone, percent
97.0%
79.7%
91.1%
80.7%
78.2%
92.3%
Black or African American alone, percent(a)
0.8%
7.7%
5.0%
13.8%
5.5%
2.0%
American Indian and Alaska Native alone, percent(a)
0.2%
0.9%
0.5%
0.3%
0.4%
0.6%
Asian alone, percent(a)
0.6%
9.3%
1.4%
2.4%
13.5%
3.2%
Native Hawaiian and Other Pacific Islander alone, percent(a)
Z
0.1%
Z
Z
0.1%
0.1%
Two or More Races, percent
1.3%
2.3%
2.0%
2.9%
2.2%
1.8%
Hispanic or Latino, percent(b)
3.2%
23.5%
3.0%
2.7%
15.3%
15.3%
White alone, not Hispanic or Latino, percent
94.1%
58.4%
88.5%
78.5%
64.2%
78.3%
Population Characteristics
Veterans, 2018-2022 1,068 29,346 4,893 11,139 27,703 13,870
Foreign born persons, percent, 2018-2022 1.1% 18.9% 2.2% 3.0% 19.9% 9.0%
Housing
Housing units, July 1, 2022, (V2022) 7,283 270,669 32,075 93,470 367,225 121,439
Owner-occupied housing unit rate, 2018-2022 79.5% 73.8% 71.0% 70.1% 73.1% 82.2%
Median value of owner-occupied housing units, 2018-2022 $131,000 $313,700 $139,500 $162,400 $361,700 $270,600
Median selected monthly owner costs -with a mortgage, 2018-2022 $1,242 $2,403 $1,297 $1,427 $2,365 $2,035
Median selected monthly owner costs -without a mortgage, 2018-2022 $504 $1,033 $496 $604 $991 $876
Median gross rent, 2018-2022 $759 $1,382 $824 $927 $1,551 $1,310
Building permits, 2022 7 955 146 201 1,121 900
Families & Living Arrangements
Households, 2018-2022 6,435 254,794 28,521 84,017 348,870 115,467
Persons per household, 2018-2022 2.41 2.72 2.28 2.29 2.63 2.68
Living in same house 1 year ago, percent of persons age 1 year+, 2018-2022 92.8% 87.1% 87.8% 87.6% 89.1% 90.3%
Language other than English spoken at home, percent of persons age 5 years+, 2018-2022 2.6% 29.9% 3.7% 4.5% 28.6% 14.5%
Computer and Internet Use
Households with a computer, percent, 2018-2022 89.4% 96.2% 89.5% 93.1% 96.5% 96.8%
Households with a broadband Internet subscription, percent, 2018-2022 87.1% 92.8% 84.0% 85.0% 93.5% 94.7%
Education
High school graduate or higher, percent of persons age 25 years+, 2018-2022 92.4% 90.8% 92.7% 93.2% 93.5% 93.9%
Bachelor's degree or higher, percent of persons age 25 years+, 2018-2022 17.9% 46.9% 27.1% 34.6% 51.1% 35.3%
Health
With a disability, under age 65 years, percent, 2018-2022 8.6% 6.6% 12.8% 9.4% 4.9% 6.4%
Persons without health insurance, under age 65 years, percent
6.7%
7.8%
6.1%
6.2%
5.8%
5.9%
Economy
In civilian labor force, total, percent of population age 16 years+, 2018-2022 59.7% 66.4% 58.4% 61.9% 68.6% 69.9%
In civilian labor force, female, percent of population age 16 years+, 2018-2022 56.6% 60.8% 55.9% 58.7% 62.0% 64.5%
Total accommodation and food services sales, 2017 ($1,000)(c) 7,592 1,677,653 147,131 490,814 2,932,078 544,939
Total health care and social assistance receipts/revenue, 2017 ($1,000)(c) 28,392 5,359,178 913,417 3,032,786 8,717,587 1,547,500
Total transportation and warehousing receipts/revenue, 2017 ($1,000)(c) D 778,801 148,777 310,697 6,347,816 352,883
Total retail sales, 2017 ($1,000)(c) 73,690 12,816,945 1,175,046 3,023,994 19,876,655 3,898,193
Total retail sales per capita, 2017(c) $4,718 $18,236 $17,518 $15,338 $21,360 $12,663
Transportation
Mean travel time to work (minutes), workers age 16 years+, 2018-2022 28.6 29.4 22.8 19.4 28.4 31.3
Income & Poverty
Median household income (in 2022 dollars), 2018-2022 $67,028 $104,553 $60,325 $71,653 $107,035 $100,101
Per capita income in past 12 months (in 2022 dollars), 2018-2022 $34,455 $53,677 $34,810 $41,387 $55,107 $46,322
Persons in poverty, percent
8.6%
8.2%
12.7%
11.2%
6.8%
5.9%
Businesses
Businesses
Total employer establishments, 2021 263 19,831 1,559 4,826 34,061 8,039
Total employment, 2021 2,150 309,173 24,017 75,733 556,167 83,529
Total annual payroll, 2021 ($1,000) 86,448 26,525,133 1,067,084 3,783,578 39,921,478 4,383,793
Total employment, percent change, 2020-2021 -1.9% -3.4% 1.6% -6.7% -5.0% -4.3%
Total nonemployer establishments, 2021 943 60,999 4,389 12,751 92,893 25,721
All employer firms, Reference year 2017 355 16,994 1,226 3,803 29,607 7,135
Men-owned employer firms, Reference year 2017 S 10,180 775 2,115 18,687 4,332
Women-owned employer firms, Reference year 2017 S 3,633 161 641 5,753 1,308
Minority-owned employer firms, Reference year 2017 S 2,667 S S 4,908 699
Nonminority-owned employer firms, Reference year 2017 S 12,836 978 2,970 22,072 5,861
Veteran-owned employer firms, Reference year 2017 S 738 S 334 1,286 346
Nonveteran-owned employer firms, Reference year 2017 S 14,656 920 2,792 25,451 6,147
Geography
Geography
Population per square mile, 2020 28.0 1,610.3 159.8 226.1 2,845.9 514.1
Population per square mile, 2010 29.3 1,585.6 157.9 227.4 2,799.8 511.9
Land area in square miles, 2020 561.24 443.61 420.21 868.26 327.80 603.40
Land area in square miles, 2010 561.20 443.67 420.15 868.30 327.50 603.17
FIPS Code 17131 17097 17199 17167 17043 17111
Value Notes

Methodology differences may exist between data sources, and so estimates from different sources are not comparable.

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., V2023) refers to the final year of the series (2020 thru 2023). Different vintage years of estimates are not comparable.

Users should exercise caution when comparing 2018-2022 ACS 5-year estimates to other ACS estimates. For more information, please visit the 2022 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.

Is this page helpful? Yes No
Thank you for your feedback. Comments or suggestions?
Comments or suggestions?
255 characters maximum 255 characters maximum reached