Data / Rankings / Households / Counties in Illinois

Counties in Illinois by households

Cook County had the highest households of 102 counties in 2023, at 2.08 million. Calhoun County had the lowest, at 1,222. The median was 10,754 and the figure for Illinois was 5 million. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest2,084,578Cook County
Lowest1,222Calhoun County
Median10,754102 counties
Illinois5,001,904History

Map of counties, 2023

Adams County: 27,770 countAlexander County: 1,826 countBond County: 6,256 countBoone County: 19,155 countBrown County: 2,021 countBureau County: 14,011 countCalhoun County: 1,222 countCarroll County: 6,478 countCass County: 5,135 countChampaign County: 83,777 countChristian County: 13,534 countClark County: 6,597 countClay County: 5,431 countClinton County: 14,463 countColes County: 20,335 countCook County: 2,084,578 countCrawford County: 7,411 countCumberland County: 4,180 countDeKalb County: 39,314 countDe Witt County: 6,642 countDouglas County: 7,821 countDuPage County: 349,497 countEdgar County: 7,612 countEdwards County: 2,653 countEffingham County: 14,030 countFayette County: 7,832 countFord County: 5,728 countFranklin County: 16,130 countFulton County: 13,902 countGallatin County: 2,096 countGreene County: 4,514 countGrundy County: 20,518 countHamilton County: 3,350 countHancock County: 7,515 countHardin County: 1,484 countHenderson County: 2,662 countHenry County: 20,261 countIroquois County: 11,333 countJackson County: 23,088 countJasper County: 3,766 countJefferson County: 14,805 countJersey County: 7,984 countJo Daviess County: 10,385 countJohnson County: 4,133 countKane County: 183,196 countKankakee County: 40,895 countKendall County: 44,526 countKnox County: 20,765 countLake County: 256,660 countLaSalle County: 45,092 countLawrence County: 5,414 countLee County: 13,382 countLivingston County: 14,614 countLogan County: 11,122 countMcDonough County: 11,760 countMcHenry County: 116,329 countMcLean County: 69,072 countMacon County: 43,334 countMacoupin County: 17,431 countMadison County: 109,385 countMarion County: 15,465 countMarshall County: 4,964 countMason County: 5,714 countMassac County: 5,482 countMenard County: 5,195 countMercer County: 6,413 countMonroe County: 13,830 countMontgomery County: 11,265 countMorgan County: 13,125 countMoultrie County: 5,822 countOgle County: 20,695 countPeoria County: 77,074 countPerry County: 7,994 countPiatt County: 6,851 countPike County: 5,815 countPope County: 1,364 countPulaski County: 1,862 countPutnam County: 2,473 countRandolph County: 11,671 countRichland County: 6,401 countRock Island County: 61,192 countSt. Clair County: 101,273 countSaline County: 10,032 countSangamon County: 84,290 countSchuyler County: 2,732 countScott County: 2,032 countShelby County: 8,795 countStark County: 2,289 countStephenson County: 19,469 countTazewell County: 53,812 countUnion County: 6,914 countVermilion County: 30,185 countWabash County: 4,784 countWarren County: 6,722 countWashington County: 5,722 countWayne County: 6,853 countWhite County: 5,669 countWhiteside County: 23,215 countWill County: 241,310 countWilliamson County: 28,774 countWinnebago County: 115,449 countWoodford County: 14,704 count
  • Under 10K
  • 10K to 20K
  • 20K to 40K
  • 40K and over
count, 2023. 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, 2023

Cook County: 2,084,578 countCook County2,084,578DuPage County: 349,497 countDuPage County349,497Lake County: 256,660 countLake County256,660Will County: 241,310 countWill County241,310Kane County: 183,196 countKane County183,196McHenry County: 116,329 countMcHenry County116,329Winnebago County: 115,449 countWinnebago County115,449Madison County: 109,385 countMadison County109,385St. Clair County: 101,273 countSt. Clair County101,273Sangamon County: 84,290 countSangamon County84,290Champaign County: 83,777 countChampaign County83,777Peoria County: 77,074 countPeoria County77,074McLean County: 69,072 countMcLean County69,072Rock Island County: 61,192 countRock Island County61,192Tazewell County: 53,812 countTazewell County53,812LaSalle County: 45,092 countLaSalle County45,092Kendall County: 44,526 countKendall County44,526Macon County: 43,334 countMacon County43,334Kankakee County: 40,895 countKankakee County40,895DeKalb County: 39,314 countDeKalb County39,314Vermilion County: 30,185 countVermilion County30,185Williamson County: 28,774 countWilliamson County28,774Adams County: 27,770 countAdams County27,770Whiteside County: 23,215 countWhiteside County23,215Jackson County: 23,088 countJackson County23,088Knox County: 20,765 countKnox County20,765Ogle County: 20,695 countOgle County20,695Grundy County: 20,518 countGrundy County20,518Coles County: 20,335 countColes County20,335Henry County: 20,261 countHenry County20,261Stephenson County: 19,469 countStephenson County19,469Boone County: 19,155 countBoone County19,155Macoupin County: 17,431 countMacoupin County17,431Franklin County: 16,130 countFranklin County16,130Marion County: 15,465 countMarion County15,465Jefferson County: 14,805 countJefferson County14,805Woodford County: 14,704 countWoodford County14,704Livingston County: 14,614 countLivingston County14,614Clinton County: 14,463 countClinton County14,463Effingham County: 14,030 countEffingham County14,030Cook County: 2,084,578 countCook County2,084,578DuPage County: 349,497 countDuPage County349,497Lake County: 256,660 countLake County256,660Will County: 241,310 countWill County241,310Kane County: 183,196 countKane County183,196McHenry County: 116,329 countMcHenry County116,329Winnebago County: 115,449 countWinnebago County115,449Madison County: 109,385 countMadison County109,385St. Clair County: 101,273 countSt. Clair County101,273Sangamon County: 84,290 countSangamon County84,290Champaign County: 83,777 countChampaign County83,777Peoria County: 77,074 countPeoria County77,074McLean County: 69,072 countMcLean County69,072Rock Island County: 61,192 countRock Island County61,192Tazewell County: 53,812 countTazewell County53,812LaSalle County: 45,092 countLaSalle County45,092Kendall County: 44,526 countKendall County44,526Macon County: 43,334 countMacon County43,334Kankakee County: 40,895 countKankakee County40,895DeKalb County: 39,314 countDeKalb County39,314Vermilion County: 30,185 countVermilion County30,185Williamson County: 28,774 countWilliamson County28,774Adams County: 27,770 countAdams County27,770Whiteside County: 23,215 countWhiteside County23,215Jackson County: 23,088 countJackson County23,088Knox County: 20,765 countKnox County20,765Ogle County: 20,695 countOgle County20,695Grundy County: 20,518 countGrundy County20,518Coles County: 20,335 countColes County20,335Henry County: 20,261 countHenry County20,261Stephenson County: 19,469 countStephenson County19,469Boone County: 19,155 countBoone County19,155Macoupin County: 17,431 countMacoupin County17,431Franklin County: 16,130 countFranklin County16,130Marion County: 15,465 countMarion County15,465Jefferson County: 14,805 countJefferson County14,805Woodford County: 14,704 countWoodford County14,704Livingston County: 14,614 countLivingston County14,614Clinton County: 14,463 countClinton County14,463Effingham County: 14,030 countEffingham County14,030
count. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25003: occupied housing units (households). Retrieved 2026-10-12.

Full ranking

RankCounties2023
count		Change on 2022
1Cook County2,084,578+0.9%
2DuPage County349,497+0.2%
3Lake County256,660+0.7%
4Will County241,310+0.9%
5Kane County183,196+0.5%
6McHenry County116,329+0.7%
7Winnebago County115,449+0.2%
8Madison County109,385+0.4%
9St. Clair County101,273+0.6%
10Sangamon County84,290+0.3%
11Champaign County83,777+1.6%
12Peoria County77,074+0.9%
13McLean County69,072+0.8%
14Rock Island County61,192+0.3%
15Tazewell County53,812+0.3%
16LaSalle County45,092-0.1%
17Kendall County44,526+1.5%
18Macon County43,334-0.1%
19Kankakee County40,895+0.7%
20DeKalb County39,314+0.4%
21Vermilion County30,185+0.9%
22Williamson County28,774+0.9%
23Adams County27,770+1%
24Whiteside County23,215+0.2%
25Jackson County23,088-0.2%
26Knox County20,765+0.1%
27Ogle County20,695-0.5%
28Grundy County20,518+0.7%
29Coles County20,335-0.2%
30Henry County20,261+0.4%
31Stephenson County19,469+0.7%
32Boone County19,155+0.7%
33Macoupin County17,431-0.8%
34Franklin County16,130+0.2%
35Marion County15,465+1.5%
36Jefferson County14,805+0.2%
37Woodford County14,704-0.1%
38Livingston County14,614-0.3%
39Clinton County14,463-0.2%
40Effingham County14,030-0.5%
41Bureau County14,011+0.8%
42Fulton County13,902-0.4%
43Monroe County13,830+2%
44Christian County13,534+0.5%
45Lee County13,382-2.1%
46Morgan County13,125-1.3%
47McDonough County11,760+1.4%
48Randolph County11,671+0.2%
49Iroquois County11,333+1%
50Montgomery County11,265+0.1%
51Logan County11,122+0.2%
52Jo Daviess County10,385+3.1%
53Saline County10,032-1.3%
54Shelby County8,795+0.4%
55Perry County7,994-1.9%
56Jersey County7,984+3.2%
57Fayette County7,832+2%
58Douglas County7,821+2.4%
59Edgar County7,612+0.2%
60Hancock County7,515+0.1%
61Crawford County7,411-0.9%
62Union County6,914+2.2%
63Wayne County6,853+0.1%
64Piatt County6,851+1%
65Warren County6,722-1.7%
66De Witt County6,642-0%
67Clark County6,597+2.3%
68Carroll County6,478+2.5%
69Mercer County6,413-0.3%
70Richland County6,401-1.3%
71Bond County6,256+0.6%
72Moultrie County5,822-0%
73Pike County5,815+1.4%
74Ford County5,728+0.7%
75Washington County5,722-0.4%
76Mason County5,714-1.3%
77White County5,669-0.1%
78Massac County5,482+1.3%
79Clay County5,431-0.8%
80Lawrence County5,414-0.2%
81Menard County5,195+2.2%
82Cass County5,135+2.6%
83Marshall County4,964-0.1%
84Wabash County4,784+0.1%
85Greene County4,514-0.6%
86Cumberland County4,180+0.9%
87Johnson County4,133+0.7%
88Jasper County3,766+1.5%
89Hamilton County3,350+2.4%
90Schuyler County2,732+0.3%
91Henderson County2,662-3%
92Edwards County2,653+1.1%
93Putnam County2,473+3%
94Stark County2,289-1.6%
95Gallatin County2,096-2.7%
96Scott County2,032+4.1%
97Brown County2,021-2.2%
98Pulaski County1,862-1.3%
99Alexander County1,826+5.7%
100Hardin County1,484+0.3%
101Pope County1,364+1.1%
102Calhoun County1,222+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/2023/table-based-SF/data/5YRData/acsdt5y2023-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, 2023) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25003.dat

MLA 9

American Community Survey 5-year estimates, table B25003: occupied housing units (households), Counties in Illinois by households, 2023. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25003.dat. Invokely, https://invokely.ai/rankings/households/illinois-counties?period=2023. 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, 2023. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25003.dat. Also distributed by Invokely, https://invokely.ai/rankings/households/illinois-counties?period=2023.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B25003: occupied housing units (households), Counties in Illinois by households, 2023 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25003.dat, via Invokely: https://invokely.ai/rankings/households/illinois-counties?period=2023 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_illinois_by_2023,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B25003: occupied housing units (households): Counties in Illinois by households, 2023}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25003.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/households/illinois-counties?period=2023. 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/2023/table-based-SF/data/5YRData/acsdt5y2023-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, 2023
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25003.dat
L2  - https://invokely.ai/rankings/households/illinois-counties?period=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/households/illinois-counties?period=2023.
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/2023/table-based-SF/data/5YRData/acsdt5y2023-b25003.dat. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest households?

Cook County, with 2.08 million in 2023, according to the U.S. Census Bureau.

Which county has the lowest households?

Calhoun County, with 1,222 in 2023.

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