Data / Rankings / Housing units / Counties in Illinois

Counties in Illinois by housing units, 2024

Cook County had the highest housing units of 102 counties in 2024, at 2.28 million. Pope County had the lowest, at 2,225. The median was 12,231 and the figure for Illinois was 5.46 million. Source: the U.S. Census Bureau.

Highest2,276,493Cook County
Lowest2,225Pope County
Median12,231102 counties
Illinois5,457,452History

Top 40 counties, 2024

Cook County: 2,276,493 countCook County2,276,493DuPage County: 367,152 countDuPage County367,152Lake County: 270,618 countLake County270,618Will County: 254,278 countWill County254,278Kane County: 190,921 countKane County190,921Winnebago County: 125,002 countWinnebago County125,002McHenry County: 121,329 countMcHenry County121,329Madison County: 119,168 countMadison County119,168St. Clair County: 115,630 countSt. Clair County115,630Champaign County: 95,115 countChampaign County95,115Sangamon County: 93,382 countSangamon County93,382Peoria County: 84,930 countPeoria County84,930McLean County: 75,305 countMcLean County75,305Rock Island County: 66,759 countRock Island County66,759Tazewell County: 58,731 countTazewell County58,731LaSalle County: 49,843 countLaSalle County49,843Macon County: 49,630 countMacon County49,630Kendall County: 46,589 countKendall County46,589Kankakee County: 45,415 countKankakee County45,415DeKalb County: 41,678 countDeKalb County41,678Vermilion County: 34,327 countVermilion County34,327Williamson County: 32,084 countWilliamson County32,084Adams County: 30,302 countAdams County30,302Jackson County: 27,727 countJackson County27,727Whiteside County: 25,837 countWhiteside County25,837Knox County: 23,758 countKnox County23,758Ogle County: 22,682 countOgle County22,682Coles County: 22,681 countColes County22,681Henry County: 22,210 countHenry County22,210Grundy County: 21,384 countGrundy County21,384Stephenson County: 21,330 countStephenson County21,330Macoupin County: 21,139 countMacoupin County21,139Boone County: 20,291 countBoone County20,291Franklin County: 18,462 countFranklin County18,462Marion County: 17,334 countMarion County17,334Jefferson County: 16,629 countJefferson County16,629Livingston County: 15,930 countLivingston County15,930Fulton County: 15,848 countFulton County15,848Clinton County: 15,765 countClinton County15,765Woodford County: 15,758 countWoodford County15,758
count. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25001: total housing units. Retrieved 2026-10-12.

Full ranking

RankCounties2024
count		Change on 2023
1Cook County2,276,493+0.3%
2DuPage County367,152+0.3%
3Lake County270,618+0.2%
4Will County254,278+0.6%
5Kane County190,921+0.5%
6Winnebago County125,0020%
7McHenry County121,329+0.6%
8Madison County119,168+0.2%
9St. Clair County115,630+0.2%
10Champaign County95,115+0.8%
11Sangamon County93,382+0.2%
12Peoria County84,930-0.1%
13McLean County75,305+0.2%
14Rock Island County66,7590%
15Tazewell County58,731+0.1%
16LaSalle County49,8430%
17Macon County49,630-0.1%
18Kendall County46,589+1.8%
19Kankakee County45,4150%
20DeKalb County41,678+0.4%
21Vermilion County34,327-0.2%
22Williamson County32,084+0.4%
23Adams County30,302+0.1%
24Jackson County27,727-0.1%
25Whiteside County25,837-0.1%
26Knox County23,758-0.1%
27Ogle County22,682+0.3%
28Coles County22,681-0.2%
29Henry County22,2100%
30Grundy County21,384+0.3%
31Stephenson County21,330-0.2%
32Macoupin County21,139+0.1%
33Boone County20,291+0.3%
34Franklin County18,462-0%
35Marion County17,334-0.3%
36Jefferson County16,629-0.1%
37Livingston County15,9300%
38Fulton County15,848-0.2%
39Clinton County15,765+0.6%
40Woodford County15,758+0.1%
41Bureau County15,630-0.1%
42Effingham County15,413+0.5%
43Christian County15,184-0%
44Morgan County15,016-0.1%
45Lee County14,9950%
46Monroe County14,759+0.6%
47McDonough County13,587-0.1%
48Jo Daviess County13,440+0.1%
49Randolph County13,422+0.2%
50Iroquois County12,789-0.2%
51Montgomery County12,495-0.3%
52Logan County11,967-0.1%
53Saline County11,547-0.3%
54Shelby County10,060+0.1%
55Jersey County9,958+0.7%
56Perry County9,152-0.2%
57Hancock County8,938-0.2%
58Fayette County8,808-0.5%
59Douglas County8,507+0.2%
60Crawford County8,457-0%
61Edgar County8,214-0.3%
62Carroll County8,204+0.2%
63Union County7,851-0.1%
64Wayne County7,680-0.2%
65Warren County7,587-0.1%
66Piatt County7,412+0.4%
67Richland County7,363-0%
68De Witt County7,320+0.1%
69Clark County7,307-0.4%
70Mercer County7,285+0.1%
71Pike County7,273-0.3%
72Bond County6,899+0.1%
73Massac County6,822-0%
74White County6,730-0.3%
75Mason County6,622+0.1%
76Washington County6,415+0.2%
77Lawrence County6,407+0.8%
78Ford County6,2630%
79Moultrie County6,240+0.6%
80Clay County6,165+0.3%
81Marshall County5,815-0.2%
82Greene County5,785-0.3%
83Cass County5,676+0.2%
84Menard County5,600-0%
85Johnson County5,541+0.1%
86Wabash County5,410-0.1%
87Cumberland County4,726+0.1%
88Jasper County4,226-0%
89Hamilton County3,803-0.2%
90Henderson County3,366-0.2%
91Schuyler County3,306-0.3%
92Putnam County3,090+0.7%
93Edwards County3,0450%
94Alexander County2,938-0.9%
95Pulaski County2,851+0.2%
96Stark County2,573-0.4%
97Gallatin County2,505-0%
98Scott County2,384-0.4%
99Hardin County2,337+2.3%
100Brown County2,3210%
101Calhoun County2,300+0.1%
102Pope County2,225-2.1%

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/2024/table-based-SF/data/5YRData/acsdt5y2024-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, 2024) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25001.dat

MLA 9

American Community Survey 5-year estimates, table B25001: total housing units, Counties in Illinois by housing units, 2024. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25001.dat. Invokely, https://invokely.ai/rankings/housing-units/illinois-counties. 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, 2024. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25001.dat. Also distributed by Invokely, https://invokely.ai/rankings/housing-units/illinois-counties.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B25001: total housing units, Counties in Illinois by housing units, 2024 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25001.dat, via Invokely: https://invokely.ai/rankings/housing-units/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 B25001: total housing units: Counties in Illinois by housing units, 2024}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25001.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/housing-units/illinois-counties. 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/2024/table-based-SF/data/5YRData/acsdt5y2024-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, 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-b25001.dat
L2  - https://invokely.ai/rankings/housing-units/illinois-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/housing-units/illinois-counties.
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/2024/table-based-SF/data/5YRData/acsdt5y2024-b25001.dat. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest housing units?

Cook County, with 2.28 million in 2024, according to the U.S. Census Bureau.

Which county has the lowest housing units?

Pope County, with 2,225 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 B25001: total housing units. Retrieved 2026-10-12.

Housing units: other rankings

Counties in Illinois: more rankings