Data / Rankings / Households / Counties in Illinois

Counties in Illinois by households, 2024

Cook County had the highest households of 102 counties in 2024, at 2.1 million. Calhoun County had the lowest, at 1,239. The median was 10,829 and the figure for Illinois was 5.04 million. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest2,100,230Cook County
Lowest1,239Calhoun County
Median10,829102 counties
Illinois5,036,449History

Map of counties, 2024

Adams County: 27,915 countAlexander County: 1,904 countBond County: 6,147 countBoone County: 19,460 countBrown County: 2,041 countBureau County: 14,028 countCalhoun County: 1,239 countCarroll County: 6,578 countCass County: 5,128 countChampaign County: 85,472 countChristian County: 13,586 countClark County: 6,555 countClay County: 5,311 countClinton County: 14,570 countColes County: 20,824 countCook County: 2,100,230 countCrawford County: 7,492 countCumberland County: 4,177 countDeKalb County: 39,550 countDe Witt County: 6,595 countDouglas County: 7,765 countDuPage County: 350,758 countEdgar County: 7,567 countEdwards County: 2,666 countEffingham County: 13,951 countFayette County: 7,814 countFord County: 5,828 countFranklin County: 16,137 countFulton County: 13,795 countGallatin County: 2,098 countGreene County: 4,452 countGrundy County: 20,595 countHamilton County: 3,387 countHancock County: 7,613 countHardin County: 1,545 countHenderson County: 2,704 countHenry County: 20,272 countIroquois County: 11,443 countJackson County: 22,955 countJasper County: 3,751 countJefferson County: 14,820 countJersey County: 7,965 countJo Daviess County: 10,391 countJohnson County: 4,101 countKane County: 184,706 countKankakee County: 40,996 countKendall County: 45,372 countKnox County: 20,972 countLake County: 258,455 countLaSalle County: 45,373 countLawrence County: 5,472 countLee County: 13,337 countLivingston County: 14,615 countLogan County: 11,266 countMcDonough County: 11,856 countMcHenry County: 117,594 countMcLean County: 70,220 countMacon County: 43,468 countMacoupin County: 17,576 countMadison County: 110,134 countMarion County: 15,512 countMarshall County: 5,094 countMason County: 5,781 countMassac County: 5,457 countMenard County: 5,228 countMercer County: 6,565 countMonroe County: 13,851 countMontgomery County: 11,319 countMorgan County: 13,076 countMoultrie County: 5,817 countOgle County: 20,821 countPeoria County: 77,755 countPerry County: 7,875 countPiatt County: 6,924 countPike County: 5,965 countPope County: 1,385 countPulaski County: 1,940 countPutnam County: 2,465 countRandolph County: 11,945 countRichland County: 6,443 countRock Island County: 61,733 countSt. Clair County: 100,846 countSaline County: 10,024 countSangamon County: 84,762 countSchuyler County: 2,734 countScott County: 2,046 countShelby County: 8,918 countStark County: 2,285 countStephenson County: 19,358 countTazewell County: 54,051 countUnion County: 6,868 countVermilion County: 30,084 countWabash County: 4,740 countWarren County: 6,787 countWashington County: 5,795 countWayne County: 6,866 countWhite County: 5,672 countWhiteside County: 23,120 countWill County: 244,273 countWilliamson County: 28,983 countWinnebago County: 116,014 countWoodford County: 14,685 count
  • Under 10K
  • 10K to 20K
  • 20K to 40K
  • 40K and over
count, 2024. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25003: occupied housing units (households). Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2024

Cook County: 2,100,230 countCook County2,100,230DuPage County: 350,758 countDuPage County350,758Lake County: 258,455 countLake County258,455Will County: 244,273 countWill County244,273Kane County: 184,706 countKane County184,706McHenry County: 117,594 countMcHenry County117,594Winnebago County: 116,014 countWinnebago County116,014Madison County: 110,134 countMadison County110,134St. Clair County: 100,846 countSt. Clair County100,846Champaign County: 85,472 countChampaign County85,472Sangamon County: 84,762 countSangamon County84,762Peoria County: 77,755 countPeoria County77,755McLean County: 70,220 countMcLean County70,220Rock Island County: 61,733 countRock Island County61,733Tazewell County: 54,051 countTazewell County54,051LaSalle County: 45,373 countLaSalle County45,373Kendall County: 45,372 countKendall County45,372Macon County: 43,468 countMacon County43,468Kankakee County: 40,996 countKankakee County40,996DeKalb County: 39,550 countDeKalb County39,550Vermilion County: 30,084 countVermilion County30,084Williamson County: 28,983 countWilliamson County28,983Adams County: 27,915 countAdams County27,915Whiteside County: 23,120 countWhiteside County23,120Jackson County: 22,955 countJackson County22,955Knox County: 20,972 countKnox County20,972Coles County: 20,824 countColes County20,824Ogle County: 20,821 countOgle County20,821Grundy County: 20,595 countGrundy County20,595Henry County: 20,272 countHenry County20,272Boone County: 19,460 countBoone County19,460Stephenson County: 19,358 countStephenson County19,358Macoupin County: 17,576 countMacoupin County17,576Franklin County: 16,137 countFranklin County16,137Marion County: 15,512 countMarion County15,512Jefferson County: 14,820 countJefferson County14,820Woodford County: 14,685 countWoodford County14,685Livingston County: 14,615 countLivingston County14,615Clinton County: 14,570 countClinton County14,570Bureau County: 14,028 countBureau County14,028Cook County: 2,100,230 countCook County2,100,230DuPage County: 350,758 countDuPage County350,758Lake County: 258,455 countLake County258,455Will County: 244,273 countWill County244,273Kane County: 184,706 countKane County184,706McHenry County: 117,594 countMcHenry County117,594Winnebago County: 116,014 countWinnebago County116,014Madison County: 110,134 countMadison County110,134St. Clair County: 100,846 countSt. Clair County100,846Champaign County: 85,472 countChampaign County85,472Sangamon County: 84,762 countSangamon County84,762Peoria County: 77,755 countPeoria County77,755McLean County: 70,220 countMcLean County70,220Rock Island County: 61,733 countRock Island County61,733Tazewell County: 54,051 countTazewell County54,051LaSalle County: 45,373 countLaSalle County45,373Kendall County: 45,372 countKendall County45,372Macon County: 43,468 countMacon County43,468Kankakee County: 40,996 countKankakee County40,996DeKalb County: 39,550 countDeKalb County39,550Vermilion County: 30,084 countVermilion County30,084Williamson County: 28,983 countWilliamson County28,983Adams County: 27,915 countAdams County27,915Whiteside County: 23,120 countWhiteside County23,120Jackson County: 22,955 countJackson County22,955Knox County: 20,972 countKnox County20,972Coles County: 20,824 countColes County20,824Ogle County: 20,821 countOgle County20,821Grundy County: 20,595 countGrundy County20,595Henry County: 20,272 countHenry County20,272Boone County: 19,460 countBoone County19,460Stephenson County: 19,358 countStephenson County19,358Macoupin County: 17,576 countMacoupin County17,576Franklin County: 16,137 countFranklin County16,137Marion County: 15,512 countMarion County15,512Jefferson County: 14,820 countJefferson County14,820Woodford County: 14,685 countWoodford County14,685Livingston County: 14,615 countLivingston County14,615Clinton County: 14,570 countClinton County14,570Bureau County: 14,028 countBureau County14,028
count. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25003: occupied housing units (households). Retrieved 2026-10-12.

Full ranking

RankCounties2024
count		Change on 2023
1Cook County2,100,230+0.8%
2DuPage County350,758+0.4%
3Lake County258,455+0.7%
4Will County244,273+1.2%
5Kane County184,706+0.8%
6McHenry County117,594+1.1%
7Winnebago County116,014+0.5%
8Madison County110,134+0.7%
9St. Clair County100,846-0.4%
10Champaign County85,472+2%
11Sangamon County84,762+0.6%
12Peoria County77,755+0.9%
13McLean County70,220+1.7%
14Rock Island County61,733+0.9%
15Tazewell County54,051+0.4%
16LaSalle County45,373+0.6%
17Kendall County45,372+1.9%
18Macon County43,468+0.3%
19Kankakee County40,996+0.2%
20DeKalb County39,550+0.6%
21Vermilion County30,084-0.3%
22Williamson County28,983+0.7%
23Adams County27,915+0.5%
24Whiteside County23,120-0.4%
25Jackson County22,955-0.6%
26Knox County20,972+1%
27Coles County20,824+2.4%
28Ogle County20,821+0.6%
29Grundy County20,595+0.4%
30Henry County20,272+0.1%
31Boone County19,460+1.6%
32Stephenson County19,358-0.6%
33Macoupin County17,576+0.8%
34Franklin County16,1370%
35Marion County15,512+0.3%
36Jefferson County14,820+0.1%
37Woodford County14,685-0.1%
38Livingston County14,6150%
39Clinton County14,570+0.7%
40Bureau County14,028+0.1%
41Effingham County13,951-0.6%
42Monroe County13,851+0.2%
43Fulton County13,795-0.8%
44Christian County13,586+0.4%
45Lee County13,337-0.3%
46Morgan County13,076-0.4%
47Randolph County11,945+2.3%
48McDonough County11,856+0.8%
49Iroquois County11,443+1%
50Montgomery County11,319+0.5%
51Logan County11,266+1.3%
52Jo Daviess County10,391+0.1%
53Saline County10,024-0.1%
54Shelby County8,918+1.4%
55Jersey County7,965-0.2%
56Perry County7,875-1.5%
57Fayette County7,814-0.2%
58Douglas County7,765-0.7%
59Hancock County7,613+1.3%
60Edgar County7,567-0.6%
61Crawford County7,492+1.1%
62Piatt County6,924+1.1%
63Union County6,868-0.7%
64Wayne County6,866+0.2%
65Warren County6,787+1%
66De Witt County6,595-0.7%
67Carroll County6,578+1.5%
68Mercer County6,565+2.4%
69Clark County6,555-0.6%
70Richland County6,443+0.7%
71Bond County6,147-1.7%
72Pike County5,965+2.6%
73Ford County5,828+1.7%
74Moultrie County5,817-0.1%
75Washington County5,795+1.3%
76Mason County5,781+1.2%
77White County5,672+0.1%
78Lawrence County5,472+1.1%
79Massac County5,457-0.5%
80Clay County5,311-2.2%
81Menard County5,228+0.6%
82Cass County5,128-0.1%
83Marshall County5,094+2.6%
84Wabash County4,740-0.9%
85Greene County4,452-1.4%
86Cumberland County4,177-0.1%
87Johnson County4,101-0.8%
88Jasper County3,751-0.4%
89Hamilton County3,387+1.1%
90Schuyler County2,734+0.1%
91Henderson County2,704+1.6%
92Edwards County2,666+0.5%
93Putnam County2,465-0.3%
94Stark County2,285-0.2%
95Gallatin County2,098+0.1%
96Scott County2,046+0.7%
97Brown County2,041+1%
98Pulaski County1,940+4.2%
99Alexander County1,904+4.3%
100Hardin County1,545+4.1%
101Pope County1,385+1.5%
102Calhoun County1,239+1.4%

Other periods

About this ranking

Number of households, which equals the number of occupied housing units. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

People living in group quarters, such as college dormitories, nursing homes and prisons, are not in households.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B25003: occupied housing units (households). https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). American Community Survey 5-year estimates, table B25003: occupied housing units (households) (Counties in Illinois by households, 2024) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat

MLA 9

American Community Survey 5-year estimates, table B25003: occupied housing units (households), Counties in Illinois by households, 2024. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat. Invokely, https://invokely.ai/rankings/households/illinois-counties. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B25003: occupied housing units (households). Counties in Illinois by households, 2024. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat. Also distributed by Invokely, https://invokely.ai/rankings/households/illinois-counties.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B25003: occupied housing units (households), Counties in Illinois by households, 2024 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat, via Invokely: https://invokely.ai/rankings/households/illinois-counties (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_illinois_by_2024,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B25003: occupied housing units (households): Counties in Illinois by households, 2024}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/households/illinois-counties. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25003: occupied housing units (households). https://www2.census.gov/programs-surveys/acs/summary\_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B25003: occupied housing units (households): Counties in Illinois by households, 2024
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat
L2  - https://invokely.ai/rankings/households/illinois-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/households/illinois-counties.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25003: occupied housing units (households). https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest households?

Cook County, with 2.1 million in 2024, according to the U.S. Census Bureau.

Which county has the lowest households?

Calhoun County, with 1,239 in 2024.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B25003: occupied housing units (households). Retrieved 2026-10-12.

Households: other rankings

Counties in Illinois: more rankings