Data / Rankings / Housing units / Counties in Illinois

Counties in Illinois by housing units

Cook County had the highest housing units of 102 counties in 2023, at 2.27 million. Pope County had the lowest, at 2,273. The median was 12,256 and the figure for Illinois was 5.44 million. Source: the U.S. Census Bureau.

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Highest2,270,349Cook County
Lowest2,273Pope County
Median12,256102 counties
Illinois5,443,501History

Map of counties, 2023

Adams County: 30,283 countAlexander County: 2,964 countBond County: 6,892 countBoone County: 20,238 countBrown County: 2,321 countBureau County: 15,646 countCalhoun County: 2,298 countCarroll County: 8,190 countCass County: 5,665 countChampaign County: 94,351 countChristian County: 15,190 countClark County: 7,333 countClay County: 6,147 countClinton County: 15,677 countColes County: 22,717 countCook County: 2,270,349 countCrawford County: 8,461 countCumberland County: 4,720 countDeKalb County: 41,499 countDe Witt County: 7,312 countDouglas County: 8,492 countDuPage County: 366,099 countEdgar County: 8,236 countEdwards County: 3,045 countEffingham County: 15,336 countFayette County: 8,849 countFord County: 6,263 countFranklin County: 18,468 countFulton County: 15,883 countGallatin County: 2,506 countGreene County: 5,801 countGrundy County: 21,324 countHamilton County: 3,809 countHancock County: 8,959 countHardin County: 2,285 countHenderson County: 3,374 countHenry County: 22,208 countIroquois County: 12,818 countJackson County: 27,750 countJasper County: 4,227 countJefferson County: 16,650 countJersey County: 9,884 countJo Daviess County: 13,425 countJohnson County: 5,538 countKane County: 189,918 countKankakee County: 45,396 countKendall County: 45,775 countKnox County: 23,788 countLake County: 270,083 countLaSalle County: 49,838 countLawrence County: 6,358 countLee County: 14,993 countLivingston County: 15,930 countLogan County: 11,984 countMcDonough County: 13,598 countMcHenry County: 120,605 countMcLean County: 75,120 countMacon County: 49,699 countMacoupin County: 21,108 countMadison County: 118,942 countMarion County: 17,379 countMarshall County: 5,824 countMason County: 6,615 countMassac County: 6,824 countMenard County: 5,602 countMercer County: 7,279 countMonroe County: 14,665 countMontgomery County: 12,528 countMorgan County: 15,033 countMoultrie County: 6,205 countOgle County: 22,625 countPeoria County: 84,992 countPerry County: 9,166 countPiatt County: 7,380 countPike County: 7,296 countPope County: 2,273 countPulaski County: 2,845 countPutnam County: 3,069 countRandolph County: 13,400 countRichland County: 7,366 countRock Island County: 66,742 countSt. Clair County: 115,348 countSaline County: 11,578 countSangamon County: 93,151 countSchuyler County: 3,317 countScott County: 2,393 countShelby County: 10,054 countStark County: 2,584 countStephenson County: 21,375 countTazewell County: 58,664 countUnion County: 7,861 countVermilion County: 34,390 countWabash County: 5,416 countWarren County: 7,598 countWashington County: 6,402 countWayne County: 7,699 countWhite County: 6,751 countWhiteside County: 25,850 countWill County: 252,684 countWilliamson County: 31,957 countWinnebago County: 124,959 countWoodford County: 15,745 count
  • Under 10K
  • 10K to 20K
  • 20K to 50K
  • 50K and over
count, 2023. 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, 2023

Cook County: 2,270,349 countCook County2,270,349DuPage County: 366,099 countDuPage County366,099Lake County: 270,083 countLake County270,083Will County: 252,684 countWill County252,684Kane County: 189,918 countKane County189,918Winnebago County: 124,959 countWinnebago County124,959McHenry County: 120,605 countMcHenry County120,605Madison County: 118,942 countMadison County118,942St. Clair County: 115,348 countSt. Clair County115,348Champaign County: 94,351 countChampaign County94,351Sangamon County: 93,151 countSangamon County93,151Peoria County: 84,992 countPeoria County84,992McLean County: 75,120 countMcLean County75,120Rock Island County: 66,742 countRock Island County66,742Tazewell County: 58,664 countTazewell County58,664LaSalle County: 49,838 countLaSalle County49,838Macon County: 49,699 countMacon County49,699Kendall County: 45,775 countKendall County45,775Kankakee County: 45,396 countKankakee County45,396DeKalb County: 41,499 countDeKalb County41,499Vermilion County: 34,390 countVermilion County34,390Williamson County: 31,957 countWilliamson County31,957Adams County: 30,283 countAdams County30,283Jackson County: 27,750 countJackson County27,750Whiteside County: 25,850 countWhiteside County25,850Knox County: 23,788 countKnox County23,788Coles County: 22,717 countColes County22,717Ogle County: 22,625 countOgle County22,625Henry County: 22,208 countHenry County22,208Stephenson County: 21,375 countStephenson County21,375Grundy County: 21,324 countGrundy County21,324Macoupin County: 21,108 countMacoupin County21,108Boone County: 20,238 countBoone County20,238Franklin County: 18,468 countFranklin County18,468Marion County: 17,379 countMarion County17,379Jefferson County: 16,650 countJefferson County16,650Livingston County: 15,930 countLivingston County15,930Fulton County: 15,883 countFulton County15,883Woodford County: 15,745 countWoodford County15,745Clinton County: 15,677 countClinton County15,677Cook County: 2,270,349 countCook County2,270,349DuPage County: 366,099 countDuPage County366,099Lake County: 270,083 countLake County270,083Will County: 252,684 countWill County252,684Kane County: 189,918 countKane County189,918Winnebago County: 124,959 countWinnebago County124,959McHenry County: 120,605 countMcHenry County120,605Madison County: 118,942 countMadison County118,942St. Clair County: 115,348 countSt. Clair County115,348Champaign County: 94,351 countChampaign County94,351Sangamon County: 93,151 countSangamon County93,151Peoria County: 84,992 countPeoria County84,992McLean County: 75,120 countMcLean County75,120Rock Island County: 66,742 countRock Island County66,742Tazewell County: 58,664 countTazewell County58,664LaSalle County: 49,838 countLaSalle County49,838Macon County: 49,699 countMacon County49,699Kendall County: 45,775 countKendall County45,775Kankakee County: 45,396 countKankakee County45,396DeKalb County: 41,499 countDeKalb County41,499Vermilion County: 34,390 countVermilion County34,390Williamson County: 31,957 countWilliamson County31,957Adams County: 30,283 countAdams County30,283Jackson County: 27,750 countJackson County27,750Whiteside County: 25,850 countWhiteside County25,850Knox County: 23,788 countKnox County23,788Coles County: 22,717 countColes County22,717Ogle County: 22,625 countOgle County22,625Henry County: 22,208 countHenry County22,208Stephenson County: 21,375 countStephenson County21,375Grundy County: 21,324 countGrundy County21,324Macoupin County: 21,108 countMacoupin County21,108Boone County: 20,238 countBoone County20,238Franklin County: 18,468 countFranklin County18,468Marion County: 17,379 countMarion County17,379Jefferson County: 16,650 countJefferson County16,650Livingston County: 15,930 countLivingston County15,930Fulton County: 15,883 countFulton County15,883Woodford County: 15,745 countWoodford County15,745Clinton County: 15,677 countClinton County15,677
count. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25001: total housing units. Retrieved 2026-10-12.

Full ranking

RankCounties2023
count		Change on 2022
1Cook County2,270,349+0.4%
2DuPage County366,099+0.2%
3Lake County270,083+0.2%
4Will County252,684+0.7%
5Kane County189,918+0.6%
6Winnebago County124,959-0.1%
7McHenry County120,605+0.5%
8Madison County118,942+0.2%
9St. Clair County115,348+0.2%
10Champaign County94,351+1%
11Sangamon County93,151+0.2%
12Peoria County84,9920%
13McLean County75,120+0.4%
14Rock Island County66,7420%
15Tazewell County58,664+0.1%
16LaSalle County49,838+0.1%
17Macon County49,699-0.1%
18Kendall County45,775+1.5%
19Kankakee County45,396+0.2%
20DeKalb County41,499+0.2%
21Vermilion County34,390-0.3%
22Williamson County31,957+0.5%
23Adams County30,283+0.2%
24Jackson County27,750-0.3%
25Whiteside County25,850-0%
26Knox County23,788-0.1%
27Coles County22,717-0.3%
28Ogle County22,625-0.1%
29Henry County22,208-0%
30Stephenson County21,375-0.1%
31Grundy County21,324+0.6%
32Macoupin County21,108+0.1%
33Boone County20,238+0.3%
34Franklin County18,468-0.1%
35Marion County17,379-0.3%
36Jefferson County16,650-0.1%
37Livingston County15,930+0.1%
38Fulton County15,883-0.1%
39Woodford County15,745+0.2%
40Clinton County15,677+0.3%
41Bureau County15,6460%
42Effingham County15,336+0.2%
43Christian County15,190-0.1%
44Morgan County15,033-0.3%
45Lee County14,9930%
46Monroe County14,665+0.7%
47McDonough County13,598-0.4%
48Jo Daviess County13,425-0.1%
49Randolph County13,400-0.1%
50Iroquois County12,8180%
51Montgomery County12,528-0.1%
52Logan County11,984-0%
53Saline County11,578-0%
54Shelby County10,0540%
55Jersey County9,884+0.5%
56Perry County9,166-0%
57Hancock County8,9590%
58Fayette County8,849+0.1%
59Douglas County8,492+0.1%
60Crawford County8,461-0.2%
61Edgar County8,236-0.4%
62Carroll County8,190-0.1%
63Union County7,861-0.1%
64Wayne County7,699+0.1%
65Warren County7,598-0.1%
66Piatt County7,3800%
67Richland County7,3660%
68Clark County7,333-0.4%
69De Witt County7,312-0.3%
70Pike County7,296-0.2%
71Mercer County7,279-0.4%
72Bond County6,892-0%
73Massac County6,824-0.1%
74White County6,751-0.4%
75Mason County6,615-0.5%
76Washington County6,402-0.2%
77Lawrence County6,3580%
78Ford County6,263-0%
79Moultrie County6,205+0.1%
80Clay County6,147-0.4%
81Marshall County5,824-0.1%
82Greene County5,801-0.3%
83Cass County5,665-0.3%
84Menard County5,602-0.1%
85Johnson County5,5380%
86Wabash County5,416+0.1%
87Cumberland County4,720-0.3%
88Jasper County4,2270%
89Hamilton County3,809-0.3%
90Henderson County3,374-0.4%
91Schuyler County3,3170%
92Putnam County3,069-0.1%
93Edwards County3,045-0.3%
94Alexander County2,964-1.2%
95Pulaski County2,845-0.6%
96Stark County2,584-0.2%
97Gallatin County2,506-0.2%
98Scott County2,393+0.2%
99Brown County2,321-0.9%
100Calhoun County2,298-1%
101Hardin County2,285+1%
102Pope County2,273-1.9%

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/2023/table-based-SF/data/5YRData/acsdt5y2023-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, 2023) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25001.dat

MLA 9

American Community Survey 5-year estimates, table B25001: total housing units, Counties in Illinois by housing units, 2023. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25001.dat. Invokely, https://invokely.ai/rankings/housing-units/illinois-counties?period=2023. 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, 2023. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25001.dat. Also distributed by Invokely, https://invokely.ai/rankings/housing-units/illinois-counties?period=2023.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B25001: total housing units, Counties in Illinois by housing units, 2023 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25001.dat, via Invokely: https://invokely.ai/rankings/housing-units/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 B25001: total housing units: Counties in Illinois by housing units, 2023}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b25001.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/housing-units/illinois-counties?period=2023. 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/2023/table-based-SF/data/5YRData/acsdt5y2023-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, 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-b25001.dat
L2  - https://invokely.ai/rankings/housing-units/illinois-counties?period=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/housing-units/illinois-counties?period=2023.
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/2023/table-based-SF/data/5YRData/acsdt5y2023-b25001.dat. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest housing units?

Cook County, with 2.27 million in 2023, according to the U.S. Census Bureau.

Which county has the lowest housing units?

Pope County, with 2,273 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 B25001: total housing units. Retrieved 2026-10-12.

Housing units: other rankings

Counties in Illinois: more rankings