Data / Rankings / Uninsured rate, under 65 (US model-based estimate) / Counties in Illinois

Counties in Illinois by uninsured rate, under 65 (US model-based estimate)

Cook County had the highest uninsured rate, under 65 (US model-based estimate) of 102 counties in 2017, at 10%. Brown County had the lowest, at 3.6%. The median was 6.1% and the figure for Illinois was 7.9%. Source: the U.S. Census Bureau.

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Highest10Cook County
Lowest3.6Brown County
Median6.1102 counties
Illinois7.9History

Map of counties, 2017

Adams County: 5.2 %Alexander County: 6.4 %Bond County: 6.6 %Boone County: 7.5 %Brown County: 3.6 %Bureau County: 6.1 %Calhoun County: 6 %Carroll County: 7 %Cass County: 8.5 %Champaign County: 6.1 %Christian County: 6 %Clark County: 5.9 %Clay County: 6.2 %Clinton County: 4.8 %Coles County: 6.9 %Cook County: 10 %Crawford County: 5.9 %Cumberland County: 6.5 %DeKalb County: 6.3 %De Witt County: 5.2 %Douglas County: 9.3 %DuPage County: 6.4 %Edgar County: 6 %Edwards County: 5.8 %Effingham County: 5.6 %Fayette County: 7.2 %Ford County: 6.2 %Franklin County: 6.8 %Fulton County: 6.4 %Gallatin County: 6.6 %Greene County: 6.4 %Grundy County: 5 %Hamilton County: 5.7 %Hancock County: 5.6 %Hardin County: 7.3 %Henderson County: 7.5 %Henry County: 6.2 %Iroquois County: 7.7 %Jackson County: 7.7 %Jasper County: 5.8 %Jefferson County: 5.9 %Jersey County: 5 %Jo Daviess County: 7.1 %Johnson County: 5.9 %Kane County: 9.1 %Kankakee County: 6.7 %Kendall County: 5.3 %Knox County: 5.8 %Lake County: 7.1 %LaSalle County: 5.9 %Lawrence County: 6.8 %Lee County: 5.8 %Livingston County: 5.7 %Logan County: 5.3 %McDonough County: 7.1 %McHenry County: 6 %McLean County: 5.1 %Macon County: 5.5 %Macoupin County: 6 %Madison County: 4.9 %Marion County: 6.2 %Marshall County: 5.9 %Mason County: 6.3 %Massac County: 6.1 %Menard County: 5.4 %Mercer County: 5.3 %Monroe County: 3.7 %Montgomery County: 6 %Morgan County: 5.2 %Moultrie County: 8 %Ogle County: 6.6 %Peoria County: 6.3 %Perry County: 5.7 %Piatt County: 4.7 %Pike County: 7.1 %Pope County: 7.5 %Pulaski County: 7.5 %Putnam County: 5.8 %Randolph County: 5.5 %Richland County: 6.3 %Rock Island County: 6.7 %St. Clair County: 6.2 %Saline County: 7.1 %Sangamon County: 5.5 %Schuyler County: 6.8 %Scott County: 5 %Shelby County: 5.1 %Stark County: 6.3 %Stephenson County: 6.3 %Tazewell County: 4.6 %Union County: 7.3 %Vermilion County: 6.5 %Wabash County: 6 %Warren County: 7.7 %Washington County: 5.3 %Wayne County: 6.7 %White County: 6.1 %Whiteside County: 6 %Will County: 6.3 %Williamson County: 5.4 %Winnebago County: 7.4 %Woodford County: 4.5 %
  • Under 5.3
  • 5.3 to 5.9
  • 5.9 to 6.1
  • 6.1 to 6.4
  • 6.4 to 7.1
  • 7.1 and over
%, 2017. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2017

Cook County: 10 %Cook County10Douglas County: 9.3 %Douglas County9.3Kane County: 9.1 %Kane County9.1Cass County: 8.5 %Cass County8.5Moultrie County: 8 %Moultrie County8Iroquois County: 7.7 %Iroquois County7.7Jackson County: 7.7 %Jackson County7.7Warren County: 7.7 %Warren County7.7Boone County: 7.5 %Boone County7.5Henderson County: 7.5 %Henderson County7.5Pope County: 7.5 %Pope County7.5Pulaski County: 7.5 %Pulaski County7.5Winnebago County: 7.4 %Winnebago County7.4Hardin County: 7.3 %Hardin County7.3Union County: 7.3 %Union County7.3Fayette County: 7.2 %Fayette County7.2Jo Daviess County: 7.1 %Jo Daviess County7.1Lake County: 7.1 %Lake County7.1McDonough County: 7.1 %McDonough County7.1Pike County: 7.1 %Pike County7.1Saline County: 7.1 %Saline County7.1Carroll County: 7 %Carroll County7Coles County: 6.9 %Coles County6.9Franklin County: 6.8 %Franklin County6.8Lawrence County: 6.8 %Lawrence County6.8Schuyler County: 6.8 %Schuyler County6.8Kankakee County: 6.7 %Kankakee County6.7Rock Island County: 6.7 %Rock Island County6.7Wayne County: 6.7 %Wayne County6.7Bond County: 6.6 %Bond County6.6Gallatin County: 6.6 %Gallatin County6.6Ogle County: 6.6 %Ogle County6.6Cumberland County: 6.5 %Cumberland County6.5Vermilion County: 6.5 %Vermilion County6.5Alexander County: 6.4 %Alexander County6.4DuPage County: 6.4 %DuPage County6.4Fulton County: 6.4 %Fulton County6.4Greene County: 6.4 %Greene County6.4DeKalb County: 6.3 %DeKalb County6.3Mason County: 6.3 %Mason County6.3Cook County: 10 %Cook County10Douglas County: 9.3 %Douglas County9.3Kane County: 9.1 %Kane County9.1Cass County: 8.5 %Cass County8.5Moultrie County: 8 %Moultrie County8Iroquois County: 7.7 %Iroquois County7.7Jackson County: 7.7 %Jackson County7.7Warren County: 7.7 %Warren County7.7Boone County: 7.5 %Boone County7.5Henderson County: 7.5 %Henderson County7.5Pope County: 7.5 %Pope County7.5Pulaski County: 7.5 %Pulaski County7.5Winnebago County: 7.4 %Winnebago County7.4Hardin County: 7.3 %Hardin County7.3Union County: 7.3 %Union County7.3Fayette County: 7.2 %Fayette County7.2Jo Daviess County: 7.1 %Jo Daviess County7.1Lake County: 7.1 %Lake County7.1McDonough County: 7.1 %McDonough County7.1Pike County: 7.1 %Pike County7.1Saline County: 7.1 %Saline County7.1Carroll County: 7 %Carroll County7Coles County: 6.9 %Coles County6.9Franklin County: 6.8 %Franklin County6.8Lawrence County: 6.8 %Lawrence County6.8Schuyler County: 6.8 %Schuyler County6.8Kankakee County: 6.7 %Kankakee County6.7Rock Island County: 6.7 %Rock Island County6.7Wayne County: 6.7 %Wayne County6.7Bond County: 6.6 %Bond County6.6Gallatin County: 6.6 %Gallatin County6.6Ogle County: 6.6 %Ogle County6.6Cumberland County: 6.5 %Cumberland County6.5Vermilion County: 6.5 %Vermilion County6.5Alexander County: 6.4 %Alexander County6.4DuPage County: 6.4 %DuPage County6.4Fulton County: 6.4 %Fulton County6.4Greene County: 6.4 %Greene County6.4DeKalb County: 6.3 %DeKalb County6.3Mason County: 6.3 %Mason County6.3
%. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Full ranking

RankCounties2017 (%)Change on 2016
1Cook County10+0.6 pts
2Douglas County9.3+0.2 pts
3Kane County9.1-0.3 pts
4Cass County8.5-0.1 pts
5Moultrie County8+1.1 pts
6Iroquois County7.7+0.7 pts
6Jackson County7.7+0.2 pts
6Warren County7.7+0.2 pts
9Boone County7.5+0.3 pts
9Henderson County7.5+0.8 pts
9Pope County7.5+0.2 pts
9Pulaski County7.5+0.4 pts
13Winnebago County7.4+0.7 pts
14Hardin County7.3+0.5 pts
14Union County7.3+0.4 pts
16Fayette County7.2+0.2 pts
17Jo Daviess County7.1+0.8 pts
17Lake County7.1-0.1 pts
17McDonough County7.1+0.6 pts
17Pike County7.1-0.6 pts
17Saline County7.1+1 pts
22Carroll County7+0.4 pts
23Coles County6.9+0.2 pts
24Franklin County6.8+0.1 pts
24Lawrence County6.8+0.6 pts
24Schuyler County6.8-0.2 pts
27Kankakee County6.7+0.1 pts
27Rock Island County6.70 pts
27Wayne County6.70 pts
30Bond County6.6+0.6 pts
30Gallatin County6.6+0.5 pts
30Ogle County6.6+0.9 pts
33Cumberland County6.5+0.5 pts
33Vermilion County6.5+0.7 pts
35Alexander County6.4+0.5 pts
35DuPage County6.4+0.6 pts
35Fulton County6.4+0.2 pts
35Greene County6.4+0.1 pts
39DeKalb County6.3-0.4 pts
39Mason County6.3+0.2 pts
39Peoria County6.3+0.5 pts
39Richland County6.3+0.5 pts
39Stark County6.3+0.8 pts
39Stephenson County6.3+0.5 pts
39Will County6.3+0.6 pts
46Clay County6.2+0.4 pts
46Ford County6.2+0.5 pts
46Henry County6.2+0.8 pts
46Marion County6.2+0.6 pts
46St. Clair County6.2+0.1 pts
51Bureau County6.1-0.4 pts
51Champaign County6.1+0.1 pts
51Massac County6.1+0.5 pts
51White County6.1-0.1 pts
55Calhoun County6+0.5 pts
55Christian County6+0.2 pts
55Edgar County60 pts
55Macoupin County6+0.3 pts
55McHenry County6+0.5 pts
55Montgomery County6+0.1 pts
55Wabash County60 pts
55Whiteside County6+0.2 pts
63Clark County5.9+0.9 pts
63Crawford County5.9+0.1 pts
63Jefferson County5.9+0.1 pts
63Johnson County5.9+0.1 pts
63LaSalle County5.9+0.1 pts
63Marshall County5.9+0.7 pts
69Edwards County5.8+0.1 pts
69Jasper County5.8-0.3 pts
69Knox County5.80 pts
69Lee County5.8+0.5 pts
69Putnam County5.8+0.1 pts
74Hamilton County5.7-0.2 pts
74Livingston County5.7+0.3 pts
74Perry County5.7+0.1 pts
77Effingham County5.6+0.5 pts
77Hancock County5.6+0.3 pts
79Macon County5.5-0.1 pts
79Randolph County5.5+0.5 pts
79Sangamon County5.5+0.9 pts
82Menard County5.4+0.6 pts
82Williamson County5.4-0.2 pts
84Kendall County5.3+0.4 pts
84Logan County5.3+0.6 pts
84Mercer County5.3+0.1 pts
84Washington County5.3+0.1 pts
88Adams County5.2+0.1 pts
88De Witt County5.2+0.1 pts
88Morgan County5.2+0.3 pts
91McLean County5.1+0.8 pts
91Shelby County5.10 pts
93Grundy County5+0.7 pts
93Jersey County5+0.2 pts
93Scott County5-0.7 pts
96Madison County4.9-0.3 pts
97Clinton County4.8+0.3 pts
98Piatt County4.7+0.2 pts
99Tazewell County4.6+0.5 pts
100Woodford County4.5+0.2 pts
101Monroe County3.7-0.1 pts
102Brown County3.60 pts

Other periods

About this ranking

People under 65 without health insurance coverage of any kind, as a percentage of all people under 65. 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. People 65 and over are left out because nearly all of them have Medicare.

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, under 65, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-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, under 65, all races, both sexes, all income levels, states and counties (Counties in Illinois by uninsured rate, under 65 (US model-based estimate), 2017) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip

MLA 9

Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties, Counties in Illinois by uninsured rate, under 65 (US model-based estimate), 2017. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/illinois-counties?period=2017. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Counties in Illinois by uninsured rate, under 65 (US model-based estimate), 2017. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/illinois-counties?period=2017.

Harvard

U.S. Census Bureau (2026) Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties, Counties in Illinois by uninsured rate, under 65 (US model-based estimate), 2017 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-under-65/illinois-counties?period=2017 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_illinois_by_2017,
  author = {{U.S. Census Bureau}},
  title = {{Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties: Counties in Illinois by uninsured rate, under 65 (US model-based estimate), 2017}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/illinois-counties?period=2017. Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties: Counties in Illinois by uninsured rate, under 65 (US model-based estimate), 2017
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-2017-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-under-65/illinois-counties?period=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/illinois-counties?period=2017.
N1  - Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. Retrieved 2026-10-12.
ER  -
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Rank Counties in Illinois by uninsured rate, under 65 (US model-based estimate) using official data, and cite the source.
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Questions

Which county has the highest uninsured rate, under 65 (US model-based estimate)?

Cook County, with 10% in 2017, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, under 65 (US model-based estimate)?

Brown County, with 3.6% in 2017.

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, under 65, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Uninsured rate, under 65 (US model-based estimate): other rankings

Counties in Illinois: more rankings