Data / Rankings / Housing units / Counties in Illinois

Counties in Illinois by housing units

Cook County had the highest housing units of 102 counties in 2022, at 2.26 million. Hardin County had the lowest, at 2,263. The median was 12,262 and the figure for Illinois was 5.43 million. Source: the U.S. Census Bureau.

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Highest2,261,319Cook County
Lowest2,263Hardin County
Median12,262102 counties
Illinois5,427,357History

Map of counties, 2022

Adams County: 30,226 countAlexander County: 3,000 countBond County: 6,895 countBoone County: 20,183 countBrown County: 2,342 countBureau County: 15,640 countCalhoun County: 2,322 countCarroll County: 8,197 countCass County: 5,684 countChampaign County: 93,444 countChristian County: 15,210 countClark County: 7,365 countClay County: 6,171 countClinton County: 15,628 countColes County: 22,786 countCook County: 2,261,319 countCrawford County: 8,481 countCumberland County: 4,734 countDeKalb County: 41,399 countDe Witt County: 7,333 countDouglas County: 8,484 countDuPage County: 365,347 countEdgar County: 8,265 countEdwards County: 3,055 countEffingham County: 15,313 countFayette County: 8,839 countFord County: 6,266 countFranklin County: 18,478 countFulton County: 15,895 countGallatin County: 2,512 countGreene County: 5,820 countGrundy County: 21,195 countHamilton County: 3,821 countHancock County: 8,956 countHardin County: 2,263 countHenderson County: 3,387 countHenry County: 22,213 countIroquois County: 12,815 countJackson County: 27,835 countJasper County: 4,225 countJefferson County: 16,659 countJersey County: 9,834 countJo Daviess County: 13,439 countJohnson County: 5,536 countKane County: 188,854 countKankakee County: 45,312 countKendall County: 45,078 countKnox County: 23,809 countLake County: 269,416 countLaSalle County: 49,796 countLawrence County: 6,355 countLee County: 14,993 countLivingston County: 15,909 countLogan County: 11,985 countMcDonough County: 13,655 countMcHenry County: 119,985 countMcLean County: 74,822 countMacon County: 49,757 countMacoupin County: 21,091 countMadison County: 118,715 countMarion County: 17,431 countMarshall County: 5,828 countMason County: 6,646 countMassac County: 6,832 countMenard County: 5,605 countMercer County: 7,311 countMonroe County: 14,560 countMontgomery County: 12,539 countMorgan County: 15,072 countMoultrie County: 6,196 countOgle County: 22,640 countPeoria County: 84,963 countPerry County: 9,170 countPiatt County: 7,377 countPike County: 7,308 countPope County: 2,317 countPulaski County: 2,862 countPutnam County: 3,071 countRandolph County: 13,412 countRichland County: 7,364 countRock Island County: 66,731 countSt. Clair County: 115,165 countSaline County: 11,579 countSangamon County: 92,938 countSchuyler County: 3,316 countScott County: 2,389 countShelby County: 10,053 countStark County: 2,588 countStephenson County: 21,402 countTazewell County: 58,634 countUnion County: 7,869 countVermilion County: 34,496 countWabash County: 5,411 countWarren County: 7,602 countWashington County: 6,415 countWayne County: 7,694 countWhite County: 6,778 countWhiteside County: 25,860 countWill County: 251,029 countWilliamson County: 31,811 countWinnebago County: 125,039 countWoodford County: 15,711 count
  • Under 10K
  • 10K to 20K
  • 20K to 50K
  • 50K and over
count, 2022. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25001: total housing units. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2022

Cook County: 2,261,319 countCook County2,261,319DuPage County: 365,347 countDuPage County365,347Lake County: 269,416 countLake County269,416Will County: 251,029 countWill County251,029Kane County: 188,854 countKane County188,854Winnebago County: 125,039 countWinnebago County125,039McHenry County: 119,985 countMcHenry County119,985Madison County: 118,715 countMadison County118,715St. Clair County: 115,165 countSt. Clair County115,165Champaign County: 93,444 countChampaign County93,444Sangamon County: 92,938 countSangamon County92,938Peoria County: 84,963 countPeoria County84,963McLean County: 74,822 countMcLean County74,822Rock Island County: 66,731 countRock Island County66,731Tazewell County: 58,634 countTazewell County58,634LaSalle County: 49,796 countLaSalle County49,796Macon County: 49,757 countMacon County49,757Kankakee County: 45,312 countKankakee County45,312Kendall County: 45,078 countKendall County45,078DeKalb County: 41,399 countDeKalb County41,399Vermilion County: 34,496 countVermilion County34,496Williamson County: 31,811 countWilliamson County31,811Adams County: 30,226 countAdams County30,226Jackson County: 27,835 countJackson County27,835Whiteside County: 25,860 countWhiteside County25,860Knox County: 23,809 countKnox County23,809Coles County: 22,786 countColes County22,786Ogle County: 22,640 countOgle County22,640Henry County: 22,213 countHenry County22,213Stephenson County: 21,402 countStephenson County21,402Grundy County: 21,195 countGrundy County21,195Macoupin County: 21,091 countMacoupin County21,091Boone County: 20,183 countBoone County20,183Franklin County: 18,478 countFranklin County18,478Marion County: 17,431 countMarion County17,431Jefferson County: 16,659 countJefferson County16,659Livingston County: 15,909 countLivingston County15,909Fulton County: 15,895 countFulton County15,895Woodford County: 15,711 countWoodford County15,711Bureau County: 15,640 countBureau County15,640Cook County: 2,261,319 countCook County2,261,319DuPage County: 365,347 countDuPage County365,347Lake County: 269,416 countLake County269,416Will County: 251,029 countWill County251,029Kane County: 188,854 countKane County188,854Winnebago County: 125,039 countWinnebago County125,039McHenry County: 119,985 countMcHenry County119,985Madison County: 118,715 countMadison County118,715St. Clair County: 115,165 countSt. Clair County115,165Champaign County: 93,444 countChampaign County93,444Sangamon County: 92,938 countSangamon County92,938Peoria County: 84,963 countPeoria County84,963McLean County: 74,822 countMcLean County74,822Rock Island County: 66,731 countRock Island County66,731Tazewell County: 58,634 countTazewell County58,634LaSalle County: 49,796 countLaSalle County49,796Macon County: 49,757 countMacon County49,757Kankakee County: 45,312 countKankakee County45,312Kendall County: 45,078 countKendall County45,078DeKalb County: 41,399 countDeKalb County41,399Vermilion County: 34,496 countVermilion County34,496Williamson County: 31,811 countWilliamson County31,811Adams County: 30,226 countAdams County30,226Jackson County: 27,835 countJackson County27,835Whiteside County: 25,860 countWhiteside County25,860Knox County: 23,809 countKnox County23,809Coles County: 22,786 countColes County22,786Ogle County: 22,640 countOgle County22,640Henry County: 22,213 countHenry County22,213Stephenson County: 21,402 countStephenson County21,402Grundy County: 21,195 countGrundy County21,195Macoupin County: 21,091 countMacoupin County21,091Boone County: 20,183 countBoone County20,183Franklin County: 18,478 countFranklin County18,478Marion County: 17,431 countMarion County17,431Jefferson County: 16,659 countJefferson County16,659Livingston County: 15,909 countLivingston County15,909Fulton County: 15,895 countFulton County15,895Woodford County: 15,711 countWoodford County15,711Bureau County: 15,640 countBureau County15,640
count. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25001: total housing units. Retrieved 2026-10-12.

Full ranking

RankCounties2022
count		Change on 2021
1Cook County2,261,319+0.3%
2DuPage County365,347+0.3%
3Lake County269,416+0.3%
4Will County251,029+0.7%
5Kane County188,854+0.5%
6Winnebago County125,039-0.1%
7McHenry County119,985+0.4%
8Madison County118,715+0.2%
9St. Clair County115,1650%
10Champaign County93,444+0.8%
11Sangamon County92,938+0.3%
12Peoria County84,963+0.1%
13McLean County74,822+0.4%
14Rock Island County66,731+0.1%
15Tazewell County58,6340%
16LaSalle County49,796-0.1%
17Macon County49,757-0.2%
18Kankakee County45,312+0.1%
19Kendall County45,078+1.4%
20DeKalb County41,399+0.3%
21Vermilion County34,496-0.4%
22Williamson County31,811+0.4%
23Adams County30,2260%
24Jackson County27,835-0.2%
25Whiteside County25,860-0%
26Knox County23,809-0.1%
27Coles County22,786-0.3%
28Ogle County22,6400%
29Henry County22,2130%
30Stephenson County21,402-0.2%
31Grundy County21,195+0.7%
32Macoupin County21,091-0.1%
33Boone County20,183+0.2%
34Franklin County18,478-0.2%
35Marion County17,431-0.2%
36Jefferson County16,6590%
37Livingston County15,909-0.1%
38Fulton County15,895+0.1%
39Woodford County15,711+0.2%
40Bureau County15,640+0.2%
41Clinton County15,628+0.3%
42Effingham County15,313+0.5%
43Christian County15,210-0.2%
44Morgan County15,072-0.1%
45Lee County14,993-0%
46Monroe County14,560+0.8%
47McDonough County13,655-0.4%
48Jo Daviess County13,439+0.1%
49Randolph County13,412-0.1%
50Iroquois County12,815-0.4%
51Montgomery County12,539-0.3%
52Logan County11,9850%
53Saline County11,579-0.1%
54Shelby County10,053-0.2%
55Jersey County9,834+0.2%
56Perry County9,1700%
57Hancock County8,956-0.3%
58Fayette County8,839-0.5%
59Douglas County8,484+0.2%
60Crawford County8,481-0.2%
61Edgar County8,265-0.5%
62Carroll County8,1970%
63Union County7,869+0.1%
64Wayne County7,694-0.2%
65Warren County7,602-0.1%
66Piatt County7,377+0.2%
67Clark County7,365-0.2%
68Richland County7,364-0.2%
69De Witt County7,333-0.2%
70Mercer County7,311+0.2%
71Pike County7,308-0.3%
72Bond County6,895-0.1%
73Massac County6,832-0.1%
74White County6,778-0.4%
75Mason County6,646-0.6%
76Washington County6,415-0.2%
77Lawrence County6,355-0.1%
78Ford County6,266-0.2%
79Moultrie County6,196+0.4%
80Clay County6,1710%
81Marshall County5,828-0.1%
82Greene County5,820-0.6%
83Cass County5,684-0.3%
84Menard County5,605-0.1%
85Johnson County5,5360%
86Wabash County5,411-0.1%
87Cumberland County4,734-0%
88Jasper County4,225-0.2%
89Hamilton County3,821-0.7%
90Henderson County3,387-1.1%
91Schuyler County3,316-0.8%
92Putnam County3,071+0.1%
93Edwards County3,055+0.1%
94Alexander County3,000-1.9%
95Pulaski County2,862-0.5%
96Stark County2,5880%
97Gallatin County2,512-0.6%
98Scott County2,389-0.6%
99Brown County2,342-0.2%
100Calhoun County2,322-0.9%
101Pope County2,317-2.2%
102Hardin County2,263+1.1%

Other periods

About this ranking

All housing units, occupied and vacant: houses, apartments, mobile homes and rooms intended as separate living quarters. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

A survey estimate averaged over five years, not a count on one date.

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 B25001: total housing units. https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b25001.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 B25001: total housing units (Counties in Illinois by housing units, 2022) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b25001.dat

MLA 9

American Community Survey 5-year estimates, table B25001: total housing units, Counties in Illinois by housing units, 2022. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b25001.dat. Invokely, https://invokely.ai/rankings/housing-units/illinois-counties?period=2022. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B25001: total housing units. Counties in Illinois by housing units, 2022. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b25001.dat. Also distributed by Invokely, https://invokely.ai/rankings/housing-units/illinois-counties?period=2022.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B25001: total housing units, Counties in Illinois by housing units, 2022 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b25001.dat, via Invokely: https://invokely.ai/rankings/housing-units/illinois-counties?period=2022 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_illinois_by_2022,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B25001: total housing units: Counties in Illinois by housing units, 2022}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b25001.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/housing-units/illinois-counties?period=2022. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25001: total housing units. https://www2.census.gov/programs-surveys/acs/summary\_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b25001.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B25001: total housing units: Counties in Illinois by housing units, 2022
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b25001.dat
L2  - https://invokely.ai/rankings/housing-units/illinois-counties?period=2022
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/housing-units/illinois-counties?period=2022.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25001: total housing units. https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b25001.dat. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest housing units?

Cook County, with 2.26 million in 2022, according to the U.S. Census Bureau.

Which county has the lowest housing units?

Hardin County, with 2,263 in 2022.

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 B25001: total housing units. Retrieved 2026-10-12.

Housing units: other rankings

Counties in Illinois: more rankings