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)

Kane County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 102 counties in 2016, at 12%. Brown County had the lowest, at 4.3%. The median was 7.1% and the figure for Illinois was 9.3%. Source: the U.S. Census Bureau.

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Highest12Kane County
Lowest4.3Brown County
Median7.1102 counties
Illinois9.3History

Map of counties, 2016

Adams County: 6.2 %Alexander County: 7.5 %Bond County: 7.1 %Boone County: 9 %Brown County: 4.3 %Bureau County: 7.8 %Calhoun County: 6.4 %Carroll County: 7.8 %Cass County: 10.6 %Champaign County: 6.9 %Christian County: 7.1 %Clark County: 6.1 %Clay County: 7.1 %Clinton County: 5.5 %Coles County: 8.1 %Cook County: 11.8 %Crawford County: 6.9 %Cumberland County: 7.2 %DeKalb County: 8.2 %De Witt County: 6.1 %Douglas County: 11 %DuPage County: 7.1 %Edgar County: 7.3 %Edwards County: 6.9 %Effingham County: 6.2 %Fayette County: 8.5 %Ford County: 7 %Franklin County: 8.3 %Fulton County: 7.5 %Gallatin County: 7.3 %Greene County: 7.6 %Grundy County: 5.4 %Hamilton County: 6.9 %Hancock County: 6.4 %Hardin County: 8 %Henderson County: 7.9 %Henry County: 6.7 %Iroquois County: 8.6 %Jackson County: 8.7 %Jasper County: 7.4 %Jefferson County: 7.1 %Jersey County: 5.8 %Jo Daviess County: 7.5 %Johnson County: 6.8 %Kane County: 12 %Kankakee County: 8.3 %Kendall County: 6.3 %Knox County: 7.2 %Lake County: 9.1 %LaSalle County: 7.2 %Lawrence County: 7.6 %Lee County: 6.3 %Livingston County: 6.6 %Logan County: 5.7 %McDonough County: 7.6 %McHenry County: 6.7 %McLean County: 5.2 %Macon County: 6.9 %Macoupin County: 6.8 %Madison County: 6.3 %Marion County: 6.9 %Marshall County: 6 %Mason County: 7.4 %Massac County: 6.8 %Menard County: 5.7 %Mercer County: 6.2 %Monroe County: 4.5 %Montgomery County: 7.2 %Morgan County: 5.9 %Moultrie County: 8.6 %Ogle County: 6.9 %Peoria County: 7.3 %Perry County: 6.8 %Piatt County: 5.3 %Pike County: 9.4 %Pope County: 8.2 %Pulaski County: 8.8 %Putnam County: 6.6 %Randolph County: 6 %Richland County: 7 %Rock Island County: 8.3 %St. Clair County: 7.7 %Saline County: 7.4 %Sangamon County: 5.5 %Schuyler County: 8.4 %Scott County: 6.7 %Shelby County: 6.1 %Stark County: 6.4 %Stephenson County: 7.1 %Tazewell County: 5 %Union County: 8.2 %Vermilion County: 7.4 %Wabash County: 7.3 %Warren County: 9.2 %Washington County: 6.1 %Wayne County: 8 %White County: 7.6 %Whiteside County: 7.1 %Will County: 7.3 %Williamson County: 7 %Winnebago County: 8.4 %Woodford County: 5.3 %
  • Under 6.1
  • 6.1 to 6.8
  • 6.8 to 7.1
  • 7.1 to 7.5
  • 7.5 to 8.3
  • 8.3 and over
%, 2016. 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, 2016

Kane County: 12 %Kane County12Cook County: 11.8 %Cook County11.8Douglas County: 11 %Douglas County11Cass County: 10.6 %Cass County10.6Pike County: 9.4 %Pike County9.4Warren County: 9.2 %Warren County9.2Lake County: 9.1 %Lake County9.1Boone County: 9 %Boone County9Pulaski County: 8.8 %Pulaski County8.8Jackson County: 8.7 %Jackson County8.7Iroquois County: 8.6 %Iroquois County8.6Moultrie County: 8.6 %Moultrie County8.6Fayette County: 8.5 %Fayette County8.5Schuyler County: 8.4 %Schuyler County8.4Winnebago County: 8.4 %Winnebago County8.4Franklin County: 8.3 %Franklin County8.3Kankakee County: 8.3 %Kankakee County8.3Rock Island County: 8.3 %Rock Island County8.3DeKalb County: 8.2 %DeKalb County8.2Pope County: 8.2 %Pope County8.2Union County: 8.2 %Union County8.2Coles County: 8.1 %Coles County8.1Hardin County: 8 %Hardin County8Wayne County: 8 %Wayne County8Henderson County: 7.9 %Henderson County7.9Bureau County: 7.8 %Bureau County7.8Carroll County: 7.8 %Carroll County7.8St. Clair County: 7.7 %St. Clair County7.7Greene County: 7.6 %Greene County7.6Lawrence County: 7.6 %Lawrence County7.6McDonough County: 7.6 %McDonough County7.6White County: 7.6 %White County7.6Alexander County: 7.5 %Alexander County7.5Fulton County: 7.5 %Fulton County7.5Jo Daviess County: 7.5 %Jo Daviess County7.5Jasper County: 7.4 %Jasper County7.4Mason County: 7.4 %Mason County7.4Saline County: 7.4 %Saline County7.4Vermilion County: 7.4 %Vermilion County7.4Edgar County: 7.3 %Edgar County7.3Kane County: 12 %Kane County12Cook County: 11.8 %Cook County11.8Douglas County: 11 %Douglas County11Cass County: 10.6 %Cass County10.6Pike County: 9.4 %Pike County9.4Warren County: 9.2 %Warren County9.2Lake County: 9.1 %Lake County9.1Boone County: 9 %Boone County9Pulaski County: 8.8 %Pulaski County8.8Jackson County: 8.7 %Jackson County8.7Iroquois County: 8.6 %Iroquois County8.6Moultrie County: 8.6 %Moultrie County8.6Fayette County: 8.5 %Fayette County8.5Schuyler County: 8.4 %Schuyler County8.4Winnebago County: 8.4 %Winnebago County8.4Franklin County: 8.3 %Franklin County8.3Kankakee County: 8.3 %Kankakee County8.3Rock Island County: 8.3 %Rock Island County8.3DeKalb County: 8.2 %DeKalb County8.2Pope County: 8.2 %Pope County8.2Union County: 8.2 %Union County8.2Coles County: 8.1 %Coles County8.1Hardin County: 8 %Hardin County8Wayne County: 8 %Wayne County8Henderson County: 7.9 %Henderson County7.9Bureau County: 7.8 %Bureau County7.8Carroll County: 7.8 %Carroll County7.8St. Clair County: 7.7 %St. Clair County7.7Greene County: 7.6 %Greene County7.6Lawrence County: 7.6 %Lawrence County7.6McDonough County: 7.6 %McDonough County7.6White County: 7.6 %White County7.6Alexander County: 7.5 %Alexander County7.5Fulton County: 7.5 %Fulton County7.5Jo Daviess County: 7.5 %Jo Daviess County7.5Jasper County: 7.4 %Jasper County7.4Mason County: 7.4 %Mason County7.4Saline County: 7.4 %Saline County7.4Vermilion County: 7.4 %Vermilion County7.4Edgar County: 7.3 %Edgar County7.3
%. 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

RankCounties2016 (%)Change on 2015
1Kane County12-1 pts
2Cook County11.8-1.6 pts
3Douglas County11-0.2 pts
4Cass County10.6+0.5 pts
5Pike County9.4+1.1 pts
6Warren County9.2-0.2 pts
7Lake County9.1-1.2 pts
8Boone County9-0.7 pts
9Pulaski County8.8+0.1 pts
10Jackson County8.7+0.3 pts
11Iroquois County8.6-0.5 pts
11Moultrie County8.6-0.2 pts
13Fayette County8.5-0.9 pts
14Schuyler County8.4+0.1 pts
14Winnebago County8.4-0.6 pts
16Franklin County8.3-0.8 pts
16Kankakee County8.3-0.5 pts
16Rock Island County8.3+0.4 pts
19DeKalb County8.2-0.4 pts
19Pope County8.2+0.1 pts
19Union County8.2-0.3 pts
22Coles County8.1+0.8 pts
23Hardin County8-0.3 pts
23Wayne County8+0.4 pts
25Henderson County7.9+0.5 pts
26Bureau County7.8+0.1 pts
26Carroll County7.8+0.3 pts
28St. Clair County7.7-0.2 pts
29Greene County7.6-0.1 pts
29Lawrence County7.6+0.5 pts
29McDonough County7.6-0.3 pts
29White County7.6+0.5 pts
33Alexander County7.5-1.3 pts
33Fulton County7.5-0.4 pts
33Jo Daviess County7.5+0.3 pts
36Jasper County7.4-0.3 pts
36Mason County7.4-0.5 pts
36Saline County7.40 pts
36Vermilion County7.4-0.4 pts
40Edgar County7.3-0.6 pts
40Gallatin County7.3-1 pts
40Peoria County7.3+0.2 pts
40Wabash County7.3+0.4 pts
40Will County7.3-0.2 pts
45Cumberland County7.2+0.1 pts
45Knox County7.2-0.1 pts
45LaSalle County7.2-0.6 pts
45Montgomery County7.2+0.3 pts
49Bond County7.1-0.1 pts
49Christian County7.1+0.4 pts
49Clay County7.1-0.4 pts
49DuPage County7.10 pts
49Jefferson County7.1+0.3 pts
49Stephenson County7.1-0.1 pts
49Whiteside County7.1-0.8 pts
56Ford County7-0.7 pts
56Richland County7+0.1 pts
56Williamson County7+0.2 pts
59Champaign County6.9-0.9 pts
59Crawford County6.9+0.4 pts
59Edwards County6.9-0.3 pts
59Hamilton County6.9-0.6 pts
59Macon County6.9-0.4 pts
59Marion County6.9-0.9 pts
59Ogle County6.9-0.7 pts
66Johnson County6.8+0.4 pts
66Macoupin County6.8-0.5 pts
66Massac County6.8-0.8 pts
66Perry County6.8-0.1 pts
70Henry County6.7-0.2 pts
70McHenry County6.7-0.6 pts
70Scott County6.7+0.3 pts
73Livingston County6.6-0.2 pts
73Putnam County6.6+0.1 pts
75Calhoun County6.4-0.2 pts
75Hancock County6.4-0.5 pts
75Stark County6.4-0.6 pts
78Kendall County6.3+0.3 pts
78Lee County6.3-0.2 pts
78Madison County6.3-0.6 pts
81Adams County6.2-0.5 pts
81Effingham County6.2+0.5 pts
81Mercer County6.2+0.2 pts
84Clark County6.1-0.4 pts
84De Witt County6.1+0.4 pts
84Shelby County6.1-1.1 pts
84Washington County6.10 pts
88Marshall County6-0.1 pts
88Randolph County6-0.4 pts
90Morgan County5.9-0.5 pts
91Jersey County5.8-0.1 pts
92Logan County5.7+0.1 pts
92Menard County5.70 pts
94Clinton County5.5-0.2 pts
94Sangamon County5.5-0.6 pts
96Grundy County5.4-0.5 pts
97Piatt County5.3-0.3 pts
97Woodford County5.3+0.1 pts
99McLean County5.2-0.4 pts
100Tazewell County5-0.3 pts
101Monroe County4.5-0.1 pts
102Brown County4.3-1.3 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-2016-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), 2016) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2016-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), 2016. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2016-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties?period=2016. 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), 2016. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2016-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties?period=2016.

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), 2016 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2016-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties?period=2016 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_illinois_by_2016,
  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), 2016}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2016-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties?period=2016. 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-2016-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), 2016
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-2016-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties?period=2016
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/illinois-counties?period=2016.
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-2016-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)?

Kane County, with 12% in 2016, according to the U.S. Census Bureau.

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

Brown County, with 4.3% in 2016.

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