Data / Rankings / Uninsured rate, ages 18 to 64 (US model-based estimate) / Counties in Illinois

Counties in Illinois by uninsured rate, ages 18 to 64 (US model-based estimate), 2024

Cook County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 102 counties in 2024, at 12.1%. Monroe County had the lowest, at 4.8%. The median was 7.8% and the figure for Illinois was 9.8%. Source: the U.S. Census Bureau.

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Highest12.1Cook County
Lowest4.8Monroe County
Median7.8102 counties
Illinois9.8History

Map of counties, 2024

Adams County: 7.1 %Alexander County: 7.5 %Bond County: 8.5 %Boone County: 9.9 %Brown County: 6.6 %Bureau County: 8.7 %Calhoun County: 5.6 %Carroll County: 9.3 %Cass County: 11.3 %Champaign County: 7.6 %Christian County: 7.5 %Clark County: 7.6 %Clay County: 8.6 %Clinton County: 6.9 %Coles County: 8.7 %Cook County: 12.1 %Crawford County: 8 %Cumberland County: 6.2 %DeKalb County: 9 %De Witt County: 6.7 %Douglas County: 12 %DuPage County: 7.5 %Edgar County: 7.9 %Edwards County: 7.1 %Effingham County: 7 %Fayette County: 10.3 %Ford County: 8.6 %Franklin County: 8.7 %Fulton County: 8.1 %Gallatin County: 8.1 %Greene County: 8.5 %Grundy County: 5.6 %Hamilton County: 7.7 %Hancock County: 7.5 %Hardin County: 6.6 %Henderson County: 7.6 %Henry County: 7.5 %Iroquois County: 9.8 %Jackson County: 9.5 %Jasper County: 6.7 %Jefferson County: 7.8 %Jersey County: 6.2 %Jo Daviess County: 7.6 %Johnson County: 9 %Kane County: 10.9 %Kankakee County: 8.3 %Kendall County: 6.5 %Knox County: 7.7 %Lake County: 9.1 %LaSalle County: 7.6 %Lawrence County: 9.3 %Lee County: 7.7 %Livingston County: 7.8 %Logan County: 6.7 %McDonough County: 8.6 %McHenry County: 7.6 %McLean County: 6.8 %Macon County: 6.9 %Macoupin County: 7.7 %Madison County: 7.2 %Marion County: 8.3 %Marshall County: 8.1 %Mason County: 8.1 %Massac County: 8.5 %Menard County: 6.7 %Mercer County: 7.5 %Monroe County: 4.8 %Montgomery County: 8.2 %Morgan County: 7.9 %Moultrie County: 11.8 %Ogle County: 8 %Peoria County: 7.8 %Perry County: 7.9 %Piatt County: 5.4 %Pike County: 8.9 %Pope County: 6.9 %Pulaski County: 7.7 %Putnam County: 7.2 %Randolph County: 8.2 %Richland County: 8.3 %Rock Island County: 9.2 %St. Clair County: 7.5 %Saline County: 8.3 %Sangamon County: 6.4 %Schuyler County: 9 %Scott County: 5.8 %Shelby County: 6.6 %Stark County: 6.4 %Stephenson County: 7.7 %Tazewell County: 6.4 %Union County: 9.5 %Vermilion County: 7.8 %Wabash County: 7.2 %Warren County: 10.5 %Washington County: 6.2 %Wayne County: 10.5 %White County: 9.4 %Whiteside County: 7.6 %Will County: 7.8 %Williamson County: 7.1 %Winnebago County: 10.3 %Woodford County: 6.3 %
  • Under 6.7
  • 6.7 to 7.5
  • 7.5 to 7.8
  • 7.8 to 8.3
  • 8.3 to 9.1
  • 9.1 and over
%, 2024. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2024

Cook County: 12.1 %Cook County12.1Douglas County: 12 %Douglas County12Moultrie County: 11.8 %Moultrie County11.8Cass County: 11.3 %Cass County11.3Kane County: 10.9 %Kane County10.9Warren County: 10.5 %Warren County10.5Wayne County: 10.5 %Wayne County10.5Fayette County: 10.3 %Fayette County10.3Winnebago County: 10.3 %Winnebago County10.3Boone County: 9.9 %Boone County9.9Iroquois County: 9.8 %Iroquois County9.8Jackson County: 9.5 %Jackson County9.5Union County: 9.5 %Union County9.5White County: 9.4 %White County9.4Carroll County: 9.3 %Carroll County9.3Lawrence County: 9.3 %Lawrence County9.3Rock Island County: 9.2 %Rock Island County9.2Lake County: 9.1 %Lake County9.1DeKalb County: 9 %DeKalb County9Johnson County: 9 %Johnson County9Schuyler County: 9 %Schuyler County9Pike County: 8.9 %Pike County8.9Bureau County: 8.7 %Bureau County8.7Coles County: 8.7 %Coles County8.7Franklin County: 8.7 %Franklin County8.7Clay County: 8.6 %Clay County8.6Ford County: 8.6 %Ford County8.6McDonough County: 8.6 %McDonough County8.6Bond County: 8.5 %Bond County8.5Greene County: 8.5 %Greene County8.5Massac County: 8.5 %Massac County8.5Kankakee County: 8.3 %Kankakee County8.3Marion County: 8.3 %Marion County8.3Richland County: 8.3 %Richland County8.3Saline County: 8.3 %Saline County8.3Montgomery County: 8.2 %Montgomery County8.2Randolph County: 8.2 %Randolph County8.2Fulton County: 8.1 %Fulton County8.1Gallatin County: 8.1 %Gallatin County8.1Marshall County: 8.1 %Marshall County8.1Cook County: 12.1 %Cook County12.1Douglas County: 12 %Douglas County12Moultrie County: 11.8 %Moultrie County11.8Cass County: 11.3 %Cass County11.3Kane County: 10.9 %Kane County10.9Warren County: 10.5 %Warren County10.5Wayne County: 10.5 %Wayne County10.5Fayette County: 10.3 %Fayette County10.3Winnebago County: 10.3 %Winnebago County10.3Boone County: 9.9 %Boone County9.9Iroquois County: 9.8 %Iroquois County9.8Jackson County: 9.5 %Jackson County9.5Union County: 9.5 %Union County9.5White County: 9.4 %White County9.4Carroll County: 9.3 %Carroll County9.3Lawrence County: 9.3 %Lawrence County9.3Rock Island County: 9.2 %Rock Island County9.2Lake County: 9.1 %Lake County9.1DeKalb County: 9 %DeKalb County9Johnson County: 9 %Johnson County9Schuyler County: 9 %Schuyler County9Pike County: 8.9 %Pike County8.9Bureau County: 8.7 %Bureau County8.7Coles County: 8.7 %Coles County8.7Franklin County: 8.7 %Franklin County8.7Clay County: 8.6 %Clay County8.6Ford County: 8.6 %Ford County8.6McDonough County: 8.6 %McDonough County8.6Bond County: 8.5 %Bond County8.5Greene County: 8.5 %Greene County8.5Massac County: 8.5 %Massac County8.5Kankakee County: 8.3 %Kankakee County8.3Marion County: 8.3 %Marion County8.3Richland County: 8.3 %Richland County8.3Saline County: 8.3 %Saline County8.3Montgomery County: 8.2 %Montgomery County8.2Randolph County: 8.2 %Randolph County8.2Fulton County: 8.1 %Fulton County8.1Gallatin County: 8.1 %Gallatin County8.1Marshall County: 8.1 %Marshall County8.1
%. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Cook County12.1+1.3 pts
2Douglas County12+0.8 pts
3Moultrie County11.8+1.8 pts
4Cass County11.3+0.9 pts
5Kane County10.9+0.4 pts
6Warren County10.5+1.7 pts
6Wayne County10.5+1.3 pts
8Fayette County10.3+1.9 pts
8Winnebago County10.3+1.5 pts
10Boone County9.9+1.9 pts
11Iroquois County9.8+1.3 pts
12Jackson County9.5+0.3 pts
12Union County9.5+0.7 pts
14White County9.4+2 pts
15Carroll County9.3+1.4 pts
15Lawrence County9.3+1.4 pts
17Rock Island County9.2+1.5 pts
18Lake County9.1+0.7 pts
19DeKalb County9+1 pts
19Johnson County9+1.6 pts
19Schuyler County9+1 pts
22Pike County8.9+0.7 pts
23Bureau County8.7+1.9 pts
23Coles County8.7+1.9 pts
23Franklin County8.7+0.3 pts
26Clay County8.6+0.9 pts
26Ford County8.6+1.4 pts
26McDonough County8.6+2.2 pts
29Bond County8.5+1.1 pts
29Greene County8.5+0.9 pts
29Massac County8.5+0.3 pts
32Kankakee County8.3+0.9 pts
32Marion County8.3+0.1 pts
32Richland County8.3+1.2 pts
32Saline County8.3+0.7 pts
36Montgomery County8.2+1.4 pts
36Randolph County8.2-0.1 pts
38Fulton County8.1+1 pts
38Gallatin County8.1+0.4 pts
38Marshall County8.1+1.5 pts
38Mason County8.1+0.8 pts
42Crawford County8+1.7 pts
42Ogle County8+1.3 pts
44Edgar County7.9+0.5 pts
44Morgan County7.9+0.6 pts
44Perry County7.9+0.4 pts
47Jefferson County7.8+0.1 pts
47Livingston County7.8+0.5 pts
47Peoria County7.8+0.8 pts
47Vermilion County7.8+0.7 pts
47Will County7.8+1.2 pts
52Hamilton County7.7-0.1 pts
52Knox County7.7-0.1 pts
52Lee County7.7+1.1 pts
52Macoupin County7.7+0.5 pts
52Pulaski County7.7+0.4 pts
52Stephenson County7.7+0.7 pts
58Champaign County7.6-0.2 pts
58Clark County7.6+1 pts
58Henderson County7.6+0.5 pts
58Jo Daviess County7.6+0.7 pts
58LaSalle County7.6+0.6 pts
58McHenry County7.6+1.3 pts
58Whiteside County7.6+0.6 pts
65Alexander County7.5+0.2 pts
65Christian County7.5+0.6 pts
65DuPage County7.5+0.5 pts
65Hancock County7.5+0.7 pts
65Henry County7.5+1.1 pts
65Mercer County7.5+1.4 pts
65St. Clair County7.5+0.6 pts
72Madison County7.2+0.7 pts
72Putnam County7.2+0.2 pts
72Wabash County7.2+1.3 pts
75Adams County7.1+1.3 pts
75Edwards County7.1-0.3 pts
75Williamson County7.1+0.5 pts
78Effingham County7+1.1 pts
79Clinton County6.9+0.9 pts
79Macon County6.9+0.9 pts
79Pope County6.9-0.1 pts
82McLean County6.8+0.3 pts
83De Witt County6.7+1 pts
83Jasper County6.7+0.1 pts
83Logan County6.7+0.9 pts
83Menard County6.7+1 pts
87Brown County6.6+0.8 pts
87Hardin County6.6+0.6 pts
87Shelby County6.6+0.8 pts
90Kendall County6.5-0.2 pts
91Sangamon County6.4-0.2 pts
91Stark County6.4-0.5 pts
91Tazewell County6.4+0.2 pts
94Woodford County6.3+0.1 pts
95Cumberland County6.2+0.7 pts
95Jersey County6.2+0.3 pts
95Washington County6.2+1.1 pts
98Scott County5.8+0.4 pts
99Calhoun County5.6-0.5 pts
99Grundy County5.6+0.4 pts
101Piatt County5.4+0.1 pts
102Monroe County4.8+0.9 pts

Other periods

About this ranking

People aged 18 to 64 without health insurance coverage of any kind, as a percentage of all people aged 18 to 64. United States: Census Bureau Small Area Health Insurance Estimates (SAHIE) for states and counties, all races, both sexes and all income levels.

A model-based single-year estimate that combines the American Community Survey with administrative records and population estimates, so every county gets a figure. Covers states and counties only, because the SAHIE dataset files have no national row. The Census Bureau advises comparing years from 2008 on only; 2013 is the updated release. Working-age adults; the rate for everyone under 65 is uninsured_rate_under_65.

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. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. 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). Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties (Counties in Illinois by uninsured rate, ages 18 to 64 (US model-based estimate), 2024) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip

MLA 9

Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties, Counties in Illinois by uninsured rate, ages 18 to 64 (US model-based estimate), 2024. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Counties in Illinois by uninsured rate, ages 18 to 64 (US model-based estimate), 2024. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties.

Harvard

U.S. Census Bureau (2026) Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties, Counties in Illinois by uninsured rate, ages 18 to 64 (US model-based estimate), 2024 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_illinois_by_2024,
  author = {{U.S. Census Bureau}},
  title = {{Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties: Counties in Illinois by uninsured rate, ages 18 to 64 (US model-based estimate), 2024}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties. Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties: Counties in Illinois by uninsured rate, ages 18 to 64 (US model-based estimate), 2024
PY  - 2026
DA  - 2026/08/06
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties.
N1  - Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest uninsured rate, ages 18 to 64 (US model-based estimate)?

Cook County, with 12.1% in 2024, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, ages 18 to 64 (US model-based estimate)?

Monroe County, with 4.8% 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, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Uninsured rate, ages 18 to 64 (US model-based estimate): other rankings

Counties in Illinois: more rankings