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 2017, at 12.3%. Monroe County had the lowest, at 4.4%. The median was 7.5% and the figure for Illinois was 9.8%. Source: the U.S. Census Bureau.

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Highest12.3Cook County
Lowest4.4Monroe County
Median7.5102 counties
Illinois9.8History

Map of counties, 2017

Adams County: 6.4 %Alexander County: 8.2 %Bond County: 7.9 %Boone County: 9.3 %Brown County: 4.4 %Bureau County: 7.4 %Calhoun County: 7.1 %Carroll County: 8.4 %Cass County: 10.5 %Champaign County: 7.2 %Christian County: 7.3 %Clark County: 7.2 %Clay County: 7.7 %Clinton County: 5.7 %Coles County: 8.3 %Cook County: 12.3 %Crawford County: 7.1 %Cumberland County: 7.8 %DeKalb County: 7.8 %De Witt County: 6.3 %Douglas County: 11.3 %DuPage County: 7.7 %Edgar County: 7.2 %Edwards County: 7.1 %Effingham County: 6.9 %Fayette County: 8.9 %Ford County: 7.6 %Franklin County: 8.5 %Fulton County: 7.8 %Gallatin County: 8 %Greene County: 7.7 %Grundy County: 6.2 %Hamilton County: 7 %Hancock County: 6.7 %Hardin County: 8.6 %Henderson County: 8.7 %Henry County: 7.7 %Iroquois County: 9.5 %Jackson County: 9.1 %Jasper County: 7.1 %Jefferson County: 7.2 %Jersey County: 6.1 %Jo Daviess County: 8.5 %Johnson County: 7 %Kane County: 11.7 %Kankakee County: 8.3 %Kendall County: 6.7 %Knox County: 7.1 %Lake County: 8.8 %LaSalle County: 7.3 %Lawrence County: 8.3 %Lee County: 7 %Livingston County: 6.9 %Logan County: 6.4 %McDonough County: 8.5 %McHenry County: 7.3 %McLean County: 6.2 %Macon County: 6.9 %Macoupin County: 7.2 %Madison County: 6 %Marion County: 7.8 %Marshall County: 6.9 %Mason County: 7.5 %Massac County: 7.6 %Menard County: 6.5 %Mercer County: 6.5 %Monroe County: 4.4 %Montgomery County: 7.3 %Morgan County: 6.3 %Moultrie County: 10 %Ogle County: 8 %Peoria County: 7.8 %Perry County: 7 %Piatt County: 5.7 %Pike County: 8.6 %Pope County: 8.4 %Pulaski County: 9.1 %Putnam County: 6.8 %Randolph County: 6.7 %Richland County: 7.9 %Rock Island County: 8.3 %St. Clair County: 7.8 %Saline County: 8.6 %Sangamon County: 6.7 %Schuyler County: 8.2 %Scott County: 5.9 %Shelby County: 6.2 %Stark County: 7.6 %Stephenson County: 7.8 %Tazewell County: 5.7 %Union County: 8.9 %Vermilion County: 8.2 %Wabash County: 7.3 %Warren County: 9.6 %Washington County: 6.4 %Wayne County: 8.3 %White County: 7.4 %Whiteside County: 7.4 %Will County: 7.9 %Williamson County: 6.6 %Winnebago County: 9.2 %Woodford County: 5.5 %
  • Under 6.5
  • 6.5 to 7.1
  • 7.1 to 7.5
  • 7.5 to 7.9
  • 7.9 to 8.6
  • 8.6 and over
%, 2017. 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, 2017

Cook County: 12.3 %Cook County12.3Kane County: 11.7 %Kane County11.7Douglas County: 11.3 %Douglas County11.3Cass County: 10.5 %Cass County10.5Moultrie County: 10 %Moultrie County10Warren County: 9.6 %Warren County9.6Iroquois County: 9.5 %Iroquois County9.5Boone County: 9.3 %Boone County9.3Winnebago County: 9.2 %Winnebago County9.2Jackson County: 9.1 %Jackson County9.1Pulaski County: 9.1 %Pulaski County9.1Fayette County: 8.9 %Fayette County8.9Union County: 8.9 %Union County8.9Lake County: 8.8 %Lake County8.8Henderson County: 8.7 %Henderson County8.7Hardin County: 8.6 %Hardin County8.6Pike County: 8.6 %Pike County8.6Saline County: 8.6 %Saline County8.6Franklin County: 8.5 %Franklin County8.5Jo Daviess County: 8.5 %Jo Daviess County8.5McDonough County: 8.5 %McDonough County8.5Carroll County: 8.4 %Carroll County8.4Pope County: 8.4 %Pope County8.4Coles County: 8.3 %Coles County8.3Kankakee County: 8.3 %Kankakee County8.3Lawrence County: 8.3 %Lawrence County8.3Rock Island County: 8.3 %Rock Island County8.3Wayne County: 8.3 %Wayne County8.3Alexander County: 8.2 %Alexander County8.2Schuyler County: 8.2 %Schuyler County8.2Vermilion County: 8.2 %Vermilion County8.2Gallatin County: 8 %Gallatin County8Ogle County: 8 %Ogle County8Bond County: 7.9 %Bond County7.9Richland County: 7.9 %Richland County7.9Will County: 7.9 %Will County7.9Cumberland County: 7.8 %Cumberland County7.8DeKalb County: 7.8 %DeKalb County7.8Fulton County: 7.8 %Fulton County7.8Marion County: 7.8 %Marion County7.8Cook County: 12.3 %Cook County12.3Kane County: 11.7 %Kane County11.7Douglas County: 11.3 %Douglas County11.3Cass County: 10.5 %Cass County10.5Moultrie County: 10 %Moultrie County10Warren County: 9.6 %Warren County9.6Iroquois County: 9.5 %Iroquois County9.5Boone County: 9.3 %Boone County9.3Winnebago County: 9.2 %Winnebago County9.2Jackson County: 9.1 %Jackson County9.1Pulaski County: 9.1 %Pulaski County9.1Fayette County: 8.9 %Fayette County8.9Union County: 8.9 %Union County8.9Lake County: 8.8 %Lake County8.8Henderson County: 8.7 %Henderson County8.7Hardin County: 8.6 %Hardin County8.6Pike County: 8.6 %Pike County8.6Saline County: 8.6 %Saline County8.6Franklin County: 8.5 %Franklin County8.5Jo Daviess County: 8.5 %Jo Daviess County8.5McDonough County: 8.5 %McDonough County8.5Carroll County: 8.4 %Carroll County8.4Pope County: 8.4 %Pope County8.4Coles County: 8.3 %Coles County8.3Kankakee County: 8.3 %Kankakee County8.3Lawrence County: 8.3 %Lawrence County8.3Rock Island County: 8.3 %Rock Island County8.3Wayne County: 8.3 %Wayne County8.3Alexander County: 8.2 %Alexander County8.2Schuyler County: 8.2 %Schuyler County8.2Vermilion County: 8.2 %Vermilion County8.2Gallatin County: 8 %Gallatin County8Ogle County: 8 %Ogle County8Bond County: 7.9 %Bond County7.9Richland County: 7.9 %Richland County7.9Will County: 7.9 %Will County7.9Cumberland County: 7.8 %Cumberland County7.8DeKalb County: 7.8 %DeKalb County7.8Fulton County: 7.8 %Fulton County7.8Marion County: 7.8 %Marion County7.8
%. 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

RankCounties2017 (%)Change on 2016
1Cook County12.3+0.5 pts
2Kane County11.7-0.3 pts
3Douglas County11.3+0.3 pts
4Cass County10.5-0.1 pts
5Moultrie County10+1.4 pts
6Warren County9.6+0.4 pts
7Iroquois County9.5+0.9 pts
8Boone County9.3+0.3 pts
9Winnebago County9.2+0.8 pts
10Jackson County9.1+0.4 pts
10Pulaski County9.1+0.3 pts
12Fayette County8.9+0.4 pts
12Union County8.9+0.7 pts
14Lake County8.8-0.3 pts
15Henderson County8.7+0.8 pts
16Hardin County8.6+0.6 pts
16Pike County8.6-0.8 pts
16Saline County8.6+1.2 pts
19Franklin County8.5+0.2 pts
19Jo Daviess County8.5+1 pts
19McDonough County8.5+0.9 pts
22Carroll County8.4+0.6 pts
22Pope County8.4+0.2 pts
24Coles County8.3+0.2 pts
24Kankakee County8.30 pts
24Lawrence County8.3+0.7 pts
24Rock Island County8.30 pts
24Wayne County8.3+0.3 pts
29Alexander County8.2+0.7 pts
29Schuyler County8.2-0.2 pts
29Vermilion County8.2+0.8 pts
32Gallatin County8+0.7 pts
32Ogle County8+1.1 pts
34Bond County7.9+0.8 pts
34Richland County7.9+0.9 pts
34Will County7.9+0.6 pts
37Cumberland County7.8+0.6 pts
37DeKalb County7.8-0.4 pts
37Fulton County7.8+0.3 pts
37Marion County7.8+0.9 pts
37Peoria County7.8+0.5 pts
37St. Clair County7.8+0.1 pts
37Stephenson County7.8+0.7 pts
44Clay County7.7+0.6 pts
44DuPage County7.7+0.6 pts
44Greene County7.7+0.1 pts
44Henry County7.7+1 pts
48Ford County7.6+0.6 pts
48Massac County7.6+0.8 pts
48Stark County7.6+1.2 pts
51Mason County7.5+0.1 pts
52Bureau County7.4-0.4 pts
52White County7.4-0.2 pts
52Whiteside County7.4+0.3 pts
55Christian County7.3+0.2 pts
55LaSalle County7.3+0.1 pts
55McHenry County7.3+0.6 pts
55Montgomery County7.3+0.1 pts
55Wabash County7.30 pts
60Champaign County7.2+0.3 pts
60Clark County7.2+1.1 pts
60Edgar County7.2-0.1 pts
60Jefferson County7.2+0.1 pts
60Macoupin County7.2+0.4 pts
65Calhoun County7.1+0.7 pts
65Crawford County7.1+0.2 pts
65Edwards County7.1+0.2 pts
65Jasper County7.1-0.3 pts
65Knox County7.1-0.1 pts
70Hamilton County7+0.1 pts
70Johnson County7+0.2 pts
70Lee County7+0.7 pts
70Perry County7+0.2 pts
74Effingham County6.9+0.7 pts
74Livingston County6.9+0.3 pts
74Macon County6.90 pts
74Marshall County6.9+0.9 pts
78Putnam County6.8+0.2 pts
79Hancock County6.7+0.3 pts
79Kendall County6.7+0.4 pts
79Randolph County6.7+0.7 pts
79Sangamon County6.7+1.2 pts
83Williamson County6.6-0.4 pts
84Menard County6.5+0.8 pts
84Mercer County6.5+0.3 pts
86Adams County6.4+0.2 pts
86Logan County6.4+0.7 pts
86Washington County6.4+0.3 pts
89De Witt County6.3+0.2 pts
89Morgan County6.3+0.4 pts
91Grundy County6.2+0.8 pts
91McLean County6.2+1 pts
91Shelby County6.2+0.1 pts
94Jersey County6.1+0.3 pts
95Madison County6-0.3 pts
96Scott County5.9-0.8 pts
97Clinton County5.7+0.2 pts
97Piatt County5.7+0.4 pts
97Tazewell County5.7+0.7 pts
100Woodford County5.5+0.2 pts
101Brown County4.4+0.1 pts
101Monroe County4.4-0.1 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-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, 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), 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, 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), 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-ages-18-64/illinois-counties?period=2017. 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), 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-ages-18-64/illinois-counties?period=2017.

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), 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-ages-18-64/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, 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), 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-ages-18-64/illinois-counties?period=2017. 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-2017-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), 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-ages-18-64/illinois-counties?period=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties?period=2017.
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-2017-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 12.3% in 2017, 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 4.4% 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, 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