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)

Cook County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 102 counties in 2019, at 13.1%. Monroe County had the lowest, at 4.5%. The median was 8.3% and the figure for Illinois was 10.5%. Source: the U.S. Census Bureau.

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Highest13.1Cook County
Lowest4.5Monroe County
Median8.3102 counties
Illinois10.5History

Map of counties, 2019

Adams County: 7.4 %Alexander County: 9.6 %Bond County: 8.3 %Boone County: 10.3 %Brown County: 4.9 %Bureau County: 8.5 %Calhoun County: 8.1 %Carroll County: 8.6 %Cass County: 12.2 %Champaign County: 8.2 %Christian County: 8.1 %Clark County: 7.6 %Clay County: 8.5 %Clinton County: 6.9 %Coles County: 8.7 %Cook County: 13.1 %Crawford County: 8 %Cumberland County: 8.2 %DeKalb County: 9 %De Witt County: 7.6 %Douglas County: 12.6 %DuPage County: 7.5 %Edgar County: 8.1 %Edwards County: 7.2 %Effingham County: 7.1 %Fayette County: 11.1 %Ford County: 8.5 %Franklin County: 9.8 %Fulton County: 9.4 %Gallatin County: 8.2 %Greene County: 8.4 %Grundy County: 6.5 %Hamilton County: 8 %Hancock County: 8 %Hardin County: 9.4 %Henderson County: 8.8 %Henry County: 8.2 %Iroquois County: 10.3 %Jackson County: 9.6 %Jasper County: 8.2 %Jefferson County: 8.7 %Jersey County: 6.9 %Jo Daviess County: 9.3 %Johnson County: 8.5 %Kane County: 12.7 %Kankakee County: 9.1 %Kendall County: 7.7 %Knox County: 8.8 %Lake County: 9.9 %LaSalle County: 7.8 %Lawrence County: 9 %Lee County: 7.4 %Livingston County: 7.8 %Logan County: 6.5 %McDonough County: 8.6 %McHenry County: 8.4 %McLean County: 6.5 %Macon County: 7.2 %Macoupin County: 7.9 %Madison County: 7.8 %Marion County: 8.6 %Marshall County: 7.4 %Mason County: 8.1 %Massac County: 8.5 %Menard County: 6.7 %Mercer County: 7.5 %Monroe County: 4.5 %Montgomery County: 8.4 %Morgan County: 7.2 %Moultrie County: 10.4 %Ogle County: 8.3 %Peoria County: 8.8 %Perry County: 8.2 %Piatt County: 6.6 %Pike County: 9.3 %Pope County: 9.3 %Pulaski County: 10.1 %Putnam County: 7.1 %Randolph County: 7.8 %Richland County: 9.2 %Rock Island County: 9.7 %St. Clair County: 8.7 %Saline County: 9 %Sangamon County: 7.8 %Schuyler County: 8.5 %Scott County: 6.5 %Shelby County: 7.1 %Stark County: 8.4 %Stephenson County: 7.9 %Tazewell County: 6.6 %Union County: 9.9 %Vermilion County: 8.2 %Wabash County: 7.9 %Warren County: 10.1 %Washington County: 6.4 %Wayne County: 10.2 %White County: 8.5 %Whiteside County: 8.1 %Will County: 8.5 %Williamson County: 8.1 %Winnebago County: 10 %Woodford County: 6.4 %
  • Under 7.2
  • 7.2 to 7.9
  • 7.9 to 8.3
  • 8.3 to 8.6
  • 8.6 to 9.6
  • 9.6 and over
%, 2019. 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, 2019

Cook County: 13.1 %Cook County13.1Kane County: 12.7 %Kane County12.7Douglas County: 12.6 %Douglas County12.6Cass County: 12.2 %Cass County12.2Fayette County: 11.1 %Fayette County11.1Moultrie County: 10.4 %Moultrie County10.4Boone County: 10.3 %Boone County10.3Iroquois County: 10.3 %Iroquois County10.3Wayne County: 10.2 %Wayne County10.2Pulaski County: 10.1 %Pulaski County10.1Warren County: 10.1 %Warren County10.1Winnebago County: 10 %Winnebago County10Lake County: 9.9 %Lake County9.9Union County: 9.9 %Union County9.9Franklin County: 9.8 %Franklin County9.8Rock Island County: 9.7 %Rock Island County9.7Alexander County: 9.6 %Alexander County9.6Jackson County: 9.6 %Jackson County9.6Fulton County: 9.4 %Fulton County9.4Hardin County: 9.4 %Hardin County9.4Jo Daviess County: 9.3 %Jo Daviess County9.3Pike County: 9.3 %Pike County9.3Pope County: 9.3 %Pope County9.3Richland County: 9.2 %Richland County9.2Kankakee County: 9.1 %Kankakee County9.1DeKalb County: 9 %DeKalb County9Lawrence County: 9 %Lawrence County9Saline County: 9 %Saline County9Henderson County: 8.8 %Henderson County8.8Knox County: 8.8 %Knox County8.8Peoria County: 8.8 %Peoria County8.8Coles County: 8.7 %Coles County8.7Jefferson County: 8.7 %Jefferson County8.7St. Clair County: 8.7 %St. Clair County8.7Carroll County: 8.6 %Carroll County8.6Marion County: 8.6 %Marion County8.6McDonough County: 8.6 %McDonough County8.6Bureau County: 8.5 %Bureau County8.5Clay County: 8.5 %Clay County8.5Ford County: 8.5 %Ford County8.5Cook County: 13.1 %Cook County13.1Kane County: 12.7 %Kane County12.7Douglas County: 12.6 %Douglas County12.6Cass County: 12.2 %Cass County12.2Fayette County: 11.1 %Fayette County11.1Moultrie County: 10.4 %Moultrie County10.4Boone County: 10.3 %Boone County10.3Iroquois County: 10.3 %Iroquois County10.3Wayne County: 10.2 %Wayne County10.2Pulaski County: 10.1 %Pulaski County10.1Warren County: 10.1 %Warren County10.1Winnebago County: 10 %Winnebago County10Lake County: 9.9 %Lake County9.9Union County: 9.9 %Union County9.9Franklin County: 9.8 %Franklin County9.8Rock Island County: 9.7 %Rock Island County9.7Alexander County: 9.6 %Alexander County9.6Jackson County: 9.6 %Jackson County9.6Fulton County: 9.4 %Fulton County9.4Hardin County: 9.4 %Hardin County9.4Jo Daviess County: 9.3 %Jo Daviess County9.3Pike County: 9.3 %Pike County9.3Pope County: 9.3 %Pope County9.3Richland County: 9.2 %Richland County9.2Kankakee County: 9.1 %Kankakee County9.1DeKalb County: 9 %DeKalb County9Lawrence County: 9 %Lawrence County9Saline County: 9 %Saline County9Henderson County: 8.8 %Henderson County8.8Knox County: 8.8 %Knox County8.8Peoria County: 8.8 %Peoria County8.8Coles County: 8.7 %Coles County8.7Jefferson County: 8.7 %Jefferson County8.7St. Clair County: 8.7 %St. Clair County8.7Carroll County: 8.6 %Carroll County8.6Marion County: 8.6 %Marion County8.6McDonough County: 8.6 %McDonough County8.6Bureau County: 8.5 %Bureau County8.5Clay County: 8.5 %Clay County8.5Ford County: 8.5 %Ford County8.5
%. 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

RankCounties2019 (%)Change on 2018
1Cook County13.1+0.7 pts
2Kane County12.7+0.5 pts
3Douglas County12.6+0.4 pts
4Cass County12.2+1 pts
5Fayette County11.1+1.6 pts
6Moultrie County10.4+0.4 pts
7Boone County10.3+1 pts
7Iroquois County10.3+1.6 pts
9Wayne County10.2+1.4 pts
10Pulaski County10.1+1.3 pts
10Warren County10.1+1.2 pts
12Winnebago County10+0.2 pts
13Lake County9.9+0.8 pts
13Union County9.9+1.4 pts
15Franklin County9.8+1.6 pts
16Rock Island County9.7+1.2 pts
17Alexander County9.6+1 pts
17Jackson County9.60 pts
19Fulton County9.4+1.2 pts
19Hardin County9.4+0.3 pts
21Jo Daviess County9.3+1.6 pts
21Pike County9.3+0.8 pts
21Pope County9.3+0.9 pts
24Richland County9.2+0.7 pts
25Kankakee County9.1+0.9 pts
26DeKalb County9+1.1 pts
26Lawrence County9+1.1 pts
26Saline County9+1.3 pts
29Henderson County8.8+0.8 pts
29Knox County8.8+0.7 pts
29Peoria County8.8+0.2 pts
32Coles County8.7+0.6 pts
32Jefferson County8.7+0.6 pts
32St. Clair County8.7+1.1 pts
35Carroll County8.6+0.5 pts
35Marion County8.6+0.3 pts
35McDonough County8.6-0.2 pts
38Bureau County8.5+0.2 pts
38Clay County8.5+0.5 pts
38Ford County8.5+0.8 pts
38Johnson County8.5+1 pts
38Massac County8.5+0.8 pts
38Schuyler County8.5+0.1 pts
38White County8.5+0.5 pts
38Will County8.5+1.1 pts
46Greene County8.4-0.4 pts
46McHenry County8.4-0.1 pts
46Montgomery County8.4+1.1 pts
46Stark County8.4+1 pts
50Bond County8.3+0.9 pts
50Ogle County8.3-0.7 pts
52Champaign County8.2+0.9 pts
52Cumberland County8.2+0.8 pts
52Gallatin County8.2+0.9 pts
52Henry County8.2+0.8 pts
52Jasper County8.2-0.3 pts
52Perry County8.2+1.4 pts
52Vermilion County8.2-0.2 pts
59Calhoun County8.1+1 pts
59Christian County8.1+0.9 pts
59Edgar County8.1+1 pts
59Mason County8.1+0.6 pts
59Whiteside County8.1+0.5 pts
59Williamson County8.1+0.5 pts
65Crawford County8+0.7 pts
65Hamilton County8+0.9 pts
65Hancock County8+1 pts
68Macoupin County7.9+0.8 pts
68Stephenson County7.9+0.5 pts
68Wabash County7.9+0.1 pts
71LaSalle County7.8+0.1 pts
71Livingston County7.8+1.2 pts
71Madison County7.8+0.5 pts
71Randolph County7.8+0.6 pts
71Sangamon County7.8+1.1 pts
76Kendall County7.7+0.3 pts
77Clark County7.6+0.6 pts
77De Witt County7.6+0.5 pts
79DuPage County7.5-0.1 pts
79Mercer County7.5+1.2 pts
81Adams County7.4+0.6 pts
81Lee County7.4+0.7 pts
81Marshall County7.4+0.5 pts
84Edwards County7.2+0.4 pts
84Macon County7.2+0.1 pts
84Morgan County7.2+0.7 pts
87Effingham County7.10 pts
87Putnam County7.1+0.6 pts
87Shelby County7.1+0.6 pts
90Clinton County6.9+0.4 pts
90Jersey County6.9+0.8 pts
92Menard County6.7+0.6 pts
93Piatt County6.60 pts
93Tazewell County6.6+0.4 pts
95Grundy County6.5+1 pts
95Logan County6.5-0.5 pts
95McLean County6.50 pts
95Scott County6.5+0.2 pts
99Washington County6.4+0.9 pts
99Woodford County6.4+0.2 pts
101Brown County4.9+0.6 pts
102Monroe County4.50 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-2019-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), 2019) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2019-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), 2019. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2019-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties?period=2019. 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), 2019. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2019-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties?period=2019.

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), 2019 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2019-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties?period=2019 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_illinois_by_2019,
  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), 2019}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2019-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties?period=2019. 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-2019-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), 2019
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-2019-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties?period=2019
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties?period=2019.
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-2019-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 13.1% in 2019, 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 4.5% in 2019.

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