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 2016, at 9.4%. Brown County had the lowest, at 3.6%. The median was 5.8% and the figure for Illinois was 7.5%. Source: the U.S. Census Bureau.

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Highest9.4Cook County
Lowest3.6Brown County
Median5.8102 counties
Illinois7.5History

Map of counties, 2016

Adams County: 5.1 %Alexander County: 5.9 %Bond County: 6 %Boone County: 7.2 %Brown County: 3.6 %Bureau County: 6.5 %Calhoun County: 5.5 %Carroll County: 6.6 %Cass County: 8.6 %Champaign County: 6 %Christian County: 5.8 %Clark County: 5 %Clay County: 5.8 %Clinton County: 4.5 %Coles County: 6.7 %Cook County: 9.4 %Crawford County: 5.8 %Cumberland County: 6 %DeKalb County: 6.7 %De Witt County: 5.1 %Douglas County: 9.1 %DuPage County: 5.8 %Edgar County: 6 %Edwards County: 5.7 %Effingham County: 5.1 %Fayette County: 7 %Ford County: 5.7 %Franklin County: 6.7 %Fulton County: 6.2 %Gallatin County: 6.1 %Greene County: 6.3 %Grundy County: 4.3 %Hamilton County: 5.9 %Hancock County: 5.3 %Hardin County: 6.8 %Henderson County: 6.7 %Henry County: 5.4 %Iroquois County: 7 %Jackson County: 7.5 %Jasper County: 6.1 %Jefferson County: 5.8 %Jersey County: 4.8 %Jo Daviess County: 6.3 %Johnson County: 5.8 %Kane County: 9.4 %Kankakee County: 6.6 %Kendall County: 4.9 %Knox County: 5.8 %Lake County: 7.2 %LaSalle County: 5.8 %Lawrence County: 6.2 %Lee County: 5.3 %Livingston County: 5.4 %Logan County: 4.7 %McDonough County: 6.5 %McHenry County: 5.5 %McLean County: 4.3 %Macon County: 5.6 %Macoupin County: 5.7 %Madison County: 5.2 %Marion County: 5.6 %Marshall County: 5.2 %Mason County: 6.1 %Massac County: 5.6 %Menard County: 4.8 %Mercer County: 5.2 %Monroe County: 3.8 %Montgomery County: 5.9 %Morgan County: 4.9 %Moultrie County: 6.9 %Ogle County: 5.7 %Peoria County: 5.8 %Perry County: 5.6 %Piatt County: 4.5 %Pike County: 7.7 %Pope County: 7.3 %Pulaski County: 7.1 %Putnam County: 5.7 %Randolph County: 5 %Richland County: 5.8 %Rock Island County: 6.7 %St. Clair County: 6.1 %Saline County: 6.1 %Sangamon County: 4.6 %Schuyler County: 7 %Scott County: 5.7 %Shelby County: 5.1 %Stark County: 5.5 %Stephenson County: 5.8 %Tazewell County: 4.1 %Union County: 6.9 %Vermilion County: 5.8 %Wabash County: 6 %Warren County: 7.5 %Washington County: 5.2 %Wayne County: 6.7 %White County: 6.2 %Whiteside County: 5.8 %Will County: 5.7 %Williamson County: 5.6 %Winnebago County: 6.7 %Woodford County: 4.3 %
  • Under 5.1
  • 5.1 to 5.6
  • 5.6 to 5.8
  • 5.8 to 6.1
  • 6.1 to 6.7
  • 6.7 and over
%, 2016. 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, 2016

Cook County: 9.4 %Cook County9.4Kane County: 9.4 %Kane County9.4Douglas County: 9.1 %Douglas County9.1Cass County: 8.6 %Cass County8.6Pike County: 7.7 %Pike County7.7Jackson County: 7.5 %Jackson County7.5Warren County: 7.5 %Warren County7.5Pope County: 7.3 %Pope County7.3Boone County: 7.2 %Boone County7.2Lake County: 7.2 %Lake County7.2Pulaski County: 7.1 %Pulaski County7.1Fayette County: 7 %Fayette County7Iroquois County: 7 %Iroquois County7Schuyler County: 7 %Schuyler County7Moultrie County: 6.9 %Moultrie County6.9Union County: 6.9 %Union County6.9Hardin County: 6.8 %Hardin County6.8Coles County: 6.7 %Coles County6.7DeKalb County: 6.7 %DeKalb County6.7Franklin County: 6.7 %Franklin County6.7Henderson County: 6.7 %Henderson County6.7Rock Island County: 6.7 %Rock Island County6.7Wayne County: 6.7 %Wayne County6.7Winnebago County: 6.7 %Winnebago County6.7Carroll County: 6.6 %Carroll County6.6Kankakee County: 6.6 %Kankakee County6.6Bureau County: 6.5 %Bureau County6.5McDonough County: 6.5 %McDonough County6.5Greene County: 6.3 %Greene County6.3Jo Daviess County: 6.3 %Jo Daviess County6.3Fulton County: 6.2 %Fulton County6.2Lawrence County: 6.2 %Lawrence County6.2White County: 6.2 %White County6.2Gallatin County: 6.1 %Gallatin County6.1Jasper County: 6.1 %Jasper County6.1Mason County: 6.1 %Mason County6.1Saline County: 6.1 %Saline County6.1St. Clair County: 6.1 %St. Clair County6.1Bond County: 6 %Bond County6Champaign County: 6 %Champaign County6Cook County: 9.4 %Cook County9.4Kane County: 9.4 %Kane County9.4Douglas County: 9.1 %Douglas County9.1Cass County: 8.6 %Cass County8.6Pike County: 7.7 %Pike County7.7Jackson County: 7.5 %Jackson County7.5Warren County: 7.5 %Warren County7.5Pope County: 7.3 %Pope County7.3Boone County: 7.2 %Boone County7.2Lake County: 7.2 %Lake County7.2Pulaski County: 7.1 %Pulaski County7.1Fayette County: 7 %Fayette County7Iroquois County: 7 %Iroquois County7Schuyler County: 7 %Schuyler County7Moultrie County: 6.9 %Moultrie County6.9Union County: 6.9 %Union County6.9Hardin County: 6.8 %Hardin County6.8Coles County: 6.7 %Coles County6.7DeKalb County: 6.7 %DeKalb County6.7Franklin County: 6.7 %Franklin County6.7Henderson County: 6.7 %Henderson County6.7Rock Island County: 6.7 %Rock Island County6.7Wayne County: 6.7 %Wayne County6.7Winnebago County: 6.7 %Winnebago County6.7Carroll County: 6.6 %Carroll County6.6Kankakee County: 6.6 %Kankakee County6.6Bureau County: 6.5 %Bureau County6.5McDonough County: 6.5 %McDonough County6.5Greene County: 6.3 %Greene County6.3Jo Daviess County: 6.3 %Jo Daviess County6.3Fulton County: 6.2 %Fulton County6.2Lawrence County: 6.2 %Lawrence County6.2White County: 6.2 %White County6.2Gallatin County: 6.1 %Gallatin County6.1Jasper County: 6.1 %Jasper County6.1Mason County: 6.1 %Mason County6.1Saline County: 6.1 %Saline County6.1St. Clair County: 6.1 %St. Clair County6.1Bond County: 6 %Bond County6Champaign County: 6 %Champaign County6
%. 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

RankCounties2016 (%)Change on 2015
1Cook County9.4-1.2 pts
1Kane County9.4-0.6 pts
3Douglas County9.1+0.1 pts
4Cass County8.6+0.2 pts
5Pike County7.7+0.8 pts
6Jackson County7.5+0.1 pts
6Warren County7.5-0.2 pts
8Pope County7.30 pts
9Boone County7.2-0.7 pts
9Lake County7.2-0.9 pts
11Pulaski County7.1-0.1 pts
12Fayette County7-0.7 pts
12Iroquois County7-0.5 pts
12Schuyler County70 pts
15Moultrie County6.9-0.3 pts
15Union County6.9-0.2 pts
17Hardin County6.8-0.3 pts
18Coles County6.7+0.5 pts
18DeKalb County6.7-0.3 pts
18Franklin County6.7-0.6 pts
18Henderson County6.7+0.3 pts
18Rock Island County6.7+0.3 pts
18Wayne County6.7+0.3 pts
18Winnebago County6.7-0.5 pts
25Carroll County6.6+0.1 pts
25Kankakee County6.6-0.5 pts
27Bureau County6.5+0.1 pts
27McDonough County6.5-0.3 pts
29Greene County6.3-0.1 pts
29Jo Daviess County6.3+0.1 pts
31Fulton County6.2-0.3 pts
31Lawrence County6.2+0.3 pts
31White County6.2+0.3 pts
34Gallatin County6.1-0.9 pts
34Jasper County6.1-0.4 pts
34Mason County6.1-0.5 pts
34Saline County6.10 pts
34St. Clair County6.1-0.2 pts
39Bond County60 pts
39Champaign County6-0.6 pts
39Cumberland County60 pts
39Edgar County6-0.6 pts
39Wabash County6+0.2 pts
44Alexander County5.9-0.9 pts
44Hamilton County5.9-0.3 pts
44Montgomery County5.9+0.1 pts
47Christian County5.8+0.2 pts
47Clay County5.8-0.4 pts
47Crawford County5.8+0.3 pts
47DuPage County5.8-0.1 pts
47Jefferson County5.8+0.1 pts
47Johnson County5.8+0.3 pts
47Knox County5.8-0.2 pts
47LaSalle County5.8-0.7 pts
47Peoria County5.80 pts
47Richland County5.8+0.1 pts
47Stephenson County5.8-0.1 pts
47Vermilion County5.8-0.4 pts
47Whiteside County5.8-0.6 pts
60Edwards County5.7-0.4 pts
60Ford County5.7-0.6 pts
60Macoupin County5.7-0.4 pts
60Ogle County5.7-0.6 pts
60Putnam County5.7-0.1 pts
60Scott County5.7+0.2 pts
60Will County5.7-0.3 pts
67Macon County5.6-0.3 pts
67Marion County5.6-0.8 pts
67Massac County5.6-0.6 pts
67Perry County5.6-0.1 pts
67Williamson County5.6+0.1 pts
72Calhoun County5.5-0.3 pts
72McHenry County5.5-0.5 pts
72Stark County5.5-0.5 pts
75Henry County5.4-0.4 pts
75Livingston County5.4-0.3 pts
77Hancock County5.3-0.5 pts
77Lee County5.3-0.2 pts
79Madison County5.2-0.4 pts
79Marshall County5.2-0.1 pts
79Mercer County5.2+0.1 pts
79Washington County5.20 pts
83Adams County5.1-0.5 pts
83De Witt County5.1+0.3 pts
83Effingham County5.1+0.4 pts
83Shelby County5.1-0.9 pts
87Clark County5-0.5 pts
87Randolph County5-0.3 pts
89Kendall County4.9+0.1 pts
89Morgan County4.9-0.4 pts
91Jersey County4.8-0.1 pts
91Menard County4.80 pts
93Logan County4.7-0.1 pts
94Sangamon County4.6-0.4 pts
95Clinton County4.5-0.2 pts
95Piatt County4.5-0.3 pts
97Grundy County4.3-0.6 pts
97McLean County4.3-0.4 pts
97Woodford County4.3+0.1 pts
100Tazewell County4.1-0.3 pts
101Monroe County3.8-0.1 pts
102Brown County3.6-1.1 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-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, under 65, all races, both sexes, all income levels, states and counties (Counties in Illinois by uninsured rate, under 65 (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, under 65, all races, both sexes, all income levels, states and counties, Counties in Illinois by uninsured rate, under 65 (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-under-65/illinois-counties?period=2016. 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), 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-under-65/illinois-counties?period=2016.

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), 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-under-65/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, under 65, all races, both sexes, all income levels, states and counties: Counties in Illinois by uninsured rate, under 65 (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-under-65/illinois-counties?period=2016. 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-2016-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), 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-under-65/illinois-counties?period=2016
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/illinois-counties?period=2016.
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-2016-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 9.4% in 2016, 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 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, 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