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)

Douglas County had the highest uninsured rate, under 65 (US model-based estimate) of 102 counties in 2020, at 11.6%. Brown County had the lowest, at 2.9%. The median was 7% and the figure for Illinois was 8.4%. Source: the U.S. Census Bureau.

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Highest11.6Douglas County
Lowest2.9Brown County
Median7102 counties
Illinois8.4History

Map of counties, 2020

Adams County: 6.2 %Alexander County: 7.1 %Bond County: 6.6 %Boone County: 8.3 %Brown County: 2.9 %Bureau County: 7.3 %Calhoun County: 7.7 %Carroll County: 6.4 %Cass County: 10.8 %Champaign County: 7.6 %Christian County: 6.3 %Clark County: 6.3 %Clay County: 7.5 %Clinton County: 5.9 %Coles County: 8.1 %Cook County: 10.3 %Crawford County: 6.4 %Cumberland County: 7 %DeKalb County: 7.4 %De Witt County: 6.4 %Douglas County: 11.6 %DuPage County: 5.9 %Edgar County: 6.2 %Edwards County: 6.6 %Effingham County: 6.7 %Fayette County: 8.1 %Ford County: 7.3 %Franklin County: 7.4 %Fulton County: 7.2 %Gallatin County: 8 %Greene County: 6.9 %Grundy County: 6 %Hamilton County: 6.5 %Hancock County: 6.3 %Hardin County: 7.6 %Henderson County: 7.5 %Henry County: 6.5 %Iroquois County: 8.8 %Jackson County: 9 %Jasper County: 7.1 %Jefferson County: 6.4 %Jersey County: 5.8 %Jo Daviess County: 7.3 %Johnson County: 5.8 %Kane County: 10.6 %Kankakee County: 8.2 %Kendall County: 5.5 %Knox County: 7 %Lake County: 7.2 %LaSalle County: 7.1 %Lawrence County: 6.2 %Lee County: 5.9 %Livingston County: 6.8 %Logan County: 5.7 %McDonough County: 8.5 %McHenry County: 6.3 %McLean County: 5.4 %Macon County: 6.3 %Macoupin County: 6.4 %Madison County: 6.2 %Marion County: 7.1 %Marshall County: 7 %Mason County: 7.6 %Massac County: 7.5 %Menard County: 5.7 %Mercer County: 6.2 %Monroe County: 4.2 %Montgomery County: 7 %Morgan County: 6.3 %Moultrie County: 9 %Ogle County: 6.9 %Peoria County: 7.1 %Perry County: 6.2 %Piatt County: 6 %Pike County: 7.3 %Pope County: 8.1 %Pulaski County: 8.6 %Putnam County: 7.2 %Randolph County: 5.7 %Richland County: 7.3 %Rock Island County: 7.8 %St. Clair County: 6.9 %Saline County: 7.4 %Sangamon County: 5.6 %Schuyler County: 8.3 %Scott County: 6.9 %Shelby County: 6.2 %Stark County: 8.1 %Stephenson County: 6.3 %Tazewell County: 5.7 %Union County: 8 %Vermilion County: 6.7 %Wabash County: 6.7 %Warren County: 8.8 %Washington County: 5.4 %Wayne County: 9.2 %White County: 7.6 %Whiteside County: 7.6 %Will County: 6.9 %Williamson County: 6.3 %Winnebago County: 8.5 %Woodford County: 5.3 %
  • Under 6
  • 6 to 6.4
  • 6.4 to 7
  • 7 to 7.3
  • 7.3 to 8.1
  • 8.1 and over
%, 2020. 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, 2020

Douglas County: 11.6 %Douglas County11.6Cass County: 10.8 %Cass County10.8Kane County: 10.6 %Kane County10.6Cook County: 10.3 %Cook County10.3Wayne County: 9.2 %Wayne County9.2Jackson County: 9 %Jackson County9Moultrie County: 9 %Moultrie County9Iroquois County: 8.8 %Iroquois County8.8Warren County: 8.8 %Warren County8.8Pulaski County: 8.6 %Pulaski County8.6McDonough County: 8.5 %McDonough County8.5Winnebago County: 8.5 %Winnebago County8.5Boone County: 8.3 %Boone County8.3Schuyler County: 8.3 %Schuyler County8.3Kankakee County: 8.2 %Kankakee County8.2Coles County: 8.1 %Coles County8.1Fayette County: 8.1 %Fayette County8.1Pope County: 8.1 %Pope County8.1Stark County: 8.1 %Stark County8.1Gallatin County: 8 %Gallatin County8Union County: 8 %Union County8Rock Island County: 7.8 %Rock Island County7.8Calhoun County: 7.7 %Calhoun County7.7Champaign County: 7.6 %Champaign County7.6Hardin County: 7.6 %Hardin County7.6Mason County: 7.6 %Mason County7.6White County: 7.6 %White County7.6Whiteside County: 7.6 %Whiteside County7.6Clay County: 7.5 %Clay County7.5Henderson County: 7.5 %Henderson County7.5Massac County: 7.5 %Massac County7.5DeKalb County: 7.4 %DeKalb County7.4Franklin County: 7.4 %Franklin County7.4Saline County: 7.4 %Saline County7.4Bureau County: 7.3 %Bureau County7.3Ford County: 7.3 %Ford County7.3Jo Daviess County: 7.3 %Jo Daviess County7.3Pike County: 7.3 %Pike County7.3Richland County: 7.3 %Richland County7.3Fulton County: 7.2 %Fulton County7.2Douglas County: 11.6 %Douglas County11.6Cass County: 10.8 %Cass County10.8Kane County: 10.6 %Kane County10.6Cook County: 10.3 %Cook County10.3Wayne County: 9.2 %Wayne County9.2Jackson County: 9 %Jackson County9Moultrie County: 9 %Moultrie County9Iroquois County: 8.8 %Iroquois County8.8Warren County: 8.8 %Warren County8.8Pulaski County: 8.6 %Pulaski County8.6McDonough County: 8.5 %McDonough County8.5Winnebago County: 8.5 %Winnebago County8.5Boone County: 8.3 %Boone County8.3Schuyler County: 8.3 %Schuyler County8.3Kankakee County: 8.2 %Kankakee County8.2Coles County: 8.1 %Coles County8.1Fayette County: 8.1 %Fayette County8.1Pope County: 8.1 %Pope County8.1Stark County: 8.1 %Stark County8.1Gallatin County: 8 %Gallatin County8Union County: 8 %Union County8Rock Island County: 7.8 %Rock Island County7.8Calhoun County: 7.7 %Calhoun County7.7Champaign County: 7.6 %Champaign County7.6Hardin County: 7.6 %Hardin County7.6Mason County: 7.6 %Mason County7.6White County: 7.6 %White County7.6Whiteside County: 7.6 %Whiteside County7.6Clay County: 7.5 %Clay County7.5Henderson County: 7.5 %Henderson County7.5Massac County: 7.5 %Massac County7.5DeKalb County: 7.4 %DeKalb County7.4Franklin County: 7.4 %Franklin County7.4Saline County: 7.4 %Saline County7.4Bureau County: 7.3 %Bureau County7.3Ford County: 7.3 %Ford County7.3Jo Daviess County: 7.3 %Jo Daviess County7.3Pike County: 7.3 %Pike County7.3Richland County: 7.3 %Richland County7.3Fulton County: 7.2 %Fulton County7.2
%. 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

RankCounties2020 (%)Change on 2019
1Douglas County11.6+0.7 pts
2Cass County10.8+0.6 pts
3Kane County10.6+0.4 pts
4Cook County10.3-0.6 pts
5Wayne County9.2+0.8 pts
6Jackson County9+0.7 pts
6Moultrie County9+0.4 pts
8Iroquois County8.8+0.1 pts
8Warren County8.8+0.3 pts
10Pulaski County8.6+0.2 pts
11McDonough County8.5+1.1 pts
11Winnebago County8.5+0.4 pts
13Boone County8.3-0.2 pts
13Schuyler County8.3+1 pts
15Kankakee County8.2+0.8 pts
16Coles County8.1+0.7 pts
16Fayette County8.1-1.2 pts
16Pope County8.1-0.3 pts
16Stark County8.1+0.9 pts
20Gallatin County8+0.9 pts
20Union County8-0.4 pts
22Rock Island County7.8-0.3 pts
23Calhoun County7.7+0.6 pts
24Champaign County7.6+0.5 pts
24Hardin County7.6-0.5 pts
24Mason County7.6+0.7 pts
24White County7.6+0.4 pts
24Whiteside County7.6+0.8 pts
29Clay County7.5+0.4 pts
29Henderson County7.5-0.3 pts
29Massac County7.5+0.4 pts
32DeKalb County7.4-0.1 pts
32Franklin County7.4-0.6 pts
32Saline County7.4-0.1 pts
35Bureau County7.30 pts
35Ford County7.3+0.2 pts
35Jo Daviess County7.3-0.7 pts
35Pike County7.3-0.4 pts
35Richland County7.3-0.4 pts
40Fulton County7.2-0.7 pts
40Lake County7.2-1 pts
40Putnam County7.2+0.9 pts
43Alexander County7.1-0.6 pts
43Jasper County7.1+0.2 pts
43LaSalle County7.1+0.6 pts
43Marion County7.1+0.1 pts
43Peoria County7.1-0.2 pts
48Cumberland County7-0.1 pts
48Knox County7-0.3 pts
48Marshall County7+0.4 pts
48Montgomery County70 pts
52Greene County6.9-0.1 pts
52Ogle County6.9-0.3 pts
52Scott County6.9+1.2 pts
52St. Clair County6.9-0.3 pts
52Will County6.90 pts
57Livingston County6.8+0.3 pts
58Effingham County6.7+0.7 pts
58Vermilion County6.7+0.1 pts
58Wabash County6.70 pts
61Bond County6.6-0.5 pts
61Edwards County6.6+0.4 pts
63Hamilton County6.5-0.2 pts
63Henry County6.5-0.3 pts
65Carroll County6.4-1 pts
65Crawford County6.4-0.4 pts
65De Witt County6.4-0.1 pts
65Jefferson County6.4-0.9 pts
65Macoupin County6.4-0.3 pts
70Christian County6.3-0.5 pts
70Clark County6.3-0.2 pts
70Hancock County6.3-0.6 pts
70Macon County6.3+0.3 pts
70McHenry County6.3-0.8 pts
70Morgan County6.3+0.2 pts
70Stephenson County6.3-0.3 pts
70Williamson County6.3-0.4 pts
78Adams County6.2+0.1 pts
78Edgar County6.2-0.8 pts
78Lawrence County6.2-1.2 pts
78Madison County6.2-0.2 pts
78Mercer County6.2-0.2 pts
78Perry County6.2-0.7 pts
78Shelby County6.2+0.1 pts
85Grundy County6+0.5 pts
85Piatt County6+0.3 pts
87Clinton County5.9-0.1 pts
87DuPage County5.9-0.5 pts
87Lee County5.9-0.3 pts
90Jersey County5.8-0.1 pts
90Johnson County5.8-1.5 pts
92Logan County5.7+0.2 pts
92Menard County5.7-0.1 pts
92Randolph County5.7-0.9 pts
92Tazewell County5.7+0.2 pts
96Sangamon County5.6-0.9 pts
97Kendall County5.5-0.9 pts
98McLean County5.4-0.4 pts
98Washington County5.4-0.2 pts
100Woodford County5.3-0.4 pts
101Monroe County4.2+0.4 pts
102Brown County2.9-1.4 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-2020-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), 2020) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-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), 2020. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/illinois-counties?period=2020. 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), 2020. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/illinois-counties?period=2020.

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), 2020 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-under-65/illinois-counties?period=2020 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_illinois_by_2020,
  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), 2020}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/illinois-counties?period=2020. 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-2020-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), 2020
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-2020-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-under-65/illinois-counties?period=2020
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/illinois-counties?period=2020.
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-2020-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)?

Douglas County, with 11.6% in 2020, according to the U.S. Census Bureau.

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

Brown County, with 2.9% in 2020.

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