Data / Rankings / Uninsured rate, all ages (US) / Counties in Illinois

Counties in Illinois by uninsured rate, all ages (US)

Douglas County had the highest uninsured rate, all ages (US) of 102 counties in 2021, at 16.5%. Calhoun County had the lowest, at 1.3%. The median was 5.4% and the figure for Illinois was 7%. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest16.5Douglas County
Lowest1.3Calhoun County
Median5.4102 counties
Illinois7History

Map of counties, 2021

Adams County: 4.5 %Alexander County: 10.3 %Bond County: 6.1 %Boone County: 6 %Brown County: 5.8 %Bureau County: 5.5 %Calhoun County: 1.3 %Carroll County: 6.3 %Cass County: 5.1 %Champaign County: 4.7 %Christian County: 4.2 %Clark County: 4.3 %Clay County: 5.9 %Clinton County: 5 %Coles County: 7.2 %Cook County: 9 %Crawford County: 5.8 %Cumberland County: 6.3 %DeKalb County: 4.9 %De Witt County: 3.6 %Douglas County: 16.5 %DuPage County: 5.3 %Edgar County: 4.7 %Edwards County: 6.9 %Effingham County: 5.1 %Fayette County: 8 %Ford County: 6.4 %Franklin County: 5.9 %Fulton County: 5 %Gallatin County: 3.2 %Greene County: 5.8 %Grundy County: 3.9 %Hamilton County: 5 %Hancock County: 4 %Hardin County: 7.5 %Henderson County: 4.1 %Henry County: 4.6 %Iroquois County: 6 %Jackson County: 7.1 %Jasper County: 6.8 %Jefferson County: 7.1 %Jersey County: 5.2 %Jo Daviess County: 5.3 %Johnson County: 5.4 %Kane County: 7.9 %Kankakee County: 5.4 %Kendall County: 4.1 %Knox County: 5.6 %Lake County: 6.6 %LaSalle County: 4.1 %Lawrence County: 8.5 %Lee County: 3.8 %Livingston County: 4.9 %Logan County: 3.4 %McDonough County: 6.7 %McHenry County: 4.9 %McLean County: 4.4 %Macon County: 4.7 %Macoupin County: 4 %Madison County: 5 %Marion County: 6.9 %Marshall County: 4.2 %Mason County: 5.4 %Massac County: 6.7 %Menard County: 2.5 %Mercer County: 5.6 %Monroe County: 2.7 %Montgomery County: 3.9 %Morgan County: 4.4 %Moultrie County: 14 %Ogle County: 5.2 %Peoria County: 6.6 %Perry County: 3.7 %Piatt County: 3.9 %Pike County: 5.7 %Pope County: 3.8 %Pulaski County: 7.3 %Putnam County: 3.6 %Randolph County: 5.6 %Richland County: 4.3 %Rock Island County: 6.2 %St. Clair County: 6.1 %Saline County: 6.4 %Sangamon County: 3.9 %Schuyler County: 6.3 %Scott County: 4.2 %Shelby County: 3.7 %Stark County: 5.3 %Stephenson County: 6.1 %Tazewell County: 4.9 %Union County: 5.5 %Vermilion County: 5.8 %Wabash County: 5.8 %Warren County: 5.7 %Washington County: 2.7 %Wayne County: 11.4 %White County: 6.9 %Whiteside County: 5.7 %Will County: 5.4 %Williamson County: 5.7 %Winnebago County: 6.5 %Woodford County: 4.3 %
  • Under 4
  • 4 to 4.8
  • 4.8 to 5.4
  • 5.4 to 5.9
  • 5.9 to 6.7
  • 6.7 and over
%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2021

Douglas County: 16.5 %Douglas County16.5Moultrie County: 14 %Moultrie County14Wayne County: 11.4 %Wayne County11.4Alexander County: 10.3 %Alexander County10.3Cook County: 9 %Cook County9Lawrence County: 8.5 %Lawrence County8.5Fayette County: 8 %Fayette County8Kane County: 7.9 %Kane County7.9Hardin County: 7.5 %Hardin County7.5Pulaski County: 7.3 %Pulaski County7.3Coles County: 7.2 %Coles County7.2Jackson County: 7.1 %Jackson County7.1Jefferson County: 7.1 %Jefferson County7.1Edwards County: 6.9 %Edwards County6.9White County: 6.9 %White County6.9Marion County: 6.9 %Marion County6.9Jasper County: 6.8 %Jasper County6.8Massac County: 6.7 %Massac County6.7McDonough County: 6.7 %McDonough County6.7Peoria County: 6.6 %Peoria County6.6Lake County: 6.6 %Lake County6.6Winnebago County: 6.5 %Winnebago County6.5Ford County: 6.4 %Ford County6.4Saline County: 6.4 %Saline County6.4Carroll County: 6.3 %Carroll County6.3Schuyler County: 6.3 %Schuyler County6.3Cumberland County: 6.3 %Cumberland County6.3Rock Island County: 6.2 %Rock Island County6.2Bond County: 6.1 %Bond County6.1Stephenson County: 6.1 %Stephenson County6.1St. Clair County: 6.1 %St. Clair County6.1Iroquois County: 6 %Iroquois County6Boone County: 6 %Boone County6Clay County: 5.9 %Clay County5.9Franklin County: 5.9 %Franklin County5.9Crawford County: 5.8 %Crawford County5.8Wabash County: 5.8 %Wabash County5.8Greene County: 5.8 %Greene County5.8Vermilion County: 5.8 %Vermilion County5.8Brown County: 5.8 %Brown County5.8Douglas County: 16.5 %Douglas County16.5Moultrie County: 14 %Moultrie County14Wayne County: 11.4 %Wayne County11.4Alexander County: 10.3 %Alexander County10.3Cook County: 9 %Cook County9Lawrence County: 8.5 %Lawrence County8.5Fayette County: 8 %Fayette County8Kane County: 7.9 %Kane County7.9Hardin County: 7.5 %Hardin County7.5Pulaski County: 7.3 %Pulaski County7.3Coles County: 7.2 %Coles County7.2Jackson County: 7.1 %Jackson County7.1Jefferson County: 7.1 %Jefferson County7.1Edwards County: 6.9 %Edwards County6.9White County: 6.9 %White County6.9Marion County: 6.9 %Marion County6.9Jasper County: 6.8 %Jasper County6.8Massac County: 6.7 %Massac County6.7McDonough County: 6.7 %McDonough County6.7Peoria County: 6.6 %Peoria County6.6Lake County: 6.6 %Lake County6.6Winnebago County: 6.5 %Winnebago County6.5Ford County: 6.4 %Ford County6.4Saline County: 6.4 %Saline County6.4Carroll County: 6.3 %Carroll County6.3Schuyler County: 6.3 %Schuyler County6.3Cumberland County: 6.3 %Cumberland County6.3Rock Island County: 6.2 %Rock Island County6.2Bond County: 6.1 %Bond County6.1Stephenson County: 6.1 %Stephenson County6.1St. Clair County: 6.1 %St. Clair County6.1Iroquois County: 6 %Iroquois County6Boone County: 6 %Boone County6Clay County: 5.9 %Clay County5.9Franklin County: 5.9 %Franklin County5.9Crawford County: 5.8 %Crawford County5.8Wabash County: 5.8 %Wabash County5.8Greene County: 5.8 %Greene County5.8Vermilion County: 5.8 %Vermilion County5.8Brown County: 5.8 %Brown County5.8
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Douglas County16.5
2Moultrie County14
3Wayne County11.4
4Alexander County10.3
5Cook County9
6Lawrence County8.5
7Fayette County8
8Kane County7.9
9Hardin County7.5
10Pulaski County7.3
11Coles County7.2
12Jackson County7.1
13Jefferson County7.1
14Edwards County6.9
15White County6.9
16Marion County6.9
17Jasper County6.8
18Massac County6.7
19McDonough County6.7
20Peoria County6.6
21Lake County6.6
22Winnebago County6.5
23Ford County6.4
24Saline County6.4
25Carroll County6.3
25Schuyler County6.3
27Cumberland County6.3
28Rock Island County6.2
29Bond County6.1
30Stephenson County6.1
31St. Clair County6.1
32Iroquois County6
33Boone County6
34Clay County5.9
35Franklin County5.9
36Crawford County5.8
36Wabash County5.8
38Greene County5.8
38Vermilion County5.8
40Brown County5.8
41Warren County5.7
42Pike County5.7
42Whiteside County5.7
44Williamson County5.7
45Mercer County5.6
45Randolph County5.6
47Knox County5.6
48Union County5.5
49Bureau County5.5
50Johnson County5.4
51Kankakee County5.4
51Mason County5.4
53Will County5.4
54Jo Daviess County5.3
54Stark County5.3
56DuPage County5.3
57Ogle County5.2
58Jersey County5.2
59Effingham County5.1
60Cass County5.1
61Hamilton County5
62Madison County5
63Clinton County5
64Fulton County5
65McHenry County4.9
66Livingston County4.9
66Tazewell County4.9
68DeKalb County4.9
69Macon County4.7
70Champaign County4.7
71Edgar County4.7
72Henry County4.6
73Adams County4.5
74Morgan County4.4
75McLean County4.4
76Clark County4.3
76Woodford County4.3
78Richland County4.3
79Marshall County4.2
79Scott County4.2
81Christian County4.2
82LaSalle County4.1
83Kendall County4.1
84Henderson County4.1
85Macoupin County4
86Hancock County4
87Piatt County3.9
88Sangamon County3.9
89Grundy County3.9
90Montgomery County3.9
91Lee County3.8
92Pope County3.8
93Perry County3.7
94Shelby County3.7
95Putnam County3.6
96De Witt County3.6
97Logan County3.4
98Gallatin County3.2
99Washington County2.7
100Monroe County2.7
101Menard County2.5
102Calhoun County1.3

Other periods

About this ranking

People without health insurance coverage of any kind, as a percentage of the civilian noninstitutionalized population. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Coverage is what people reported at the interview, so the five-year figure averages five years of answers. People whose only coverage is the Indian Health Service count as uninsured. Active-duty military and people living in institutions are outside the universe. For single-year model-based county figures under 65, see uninsured_rate_under_65, uninsured_rate_18_64 and uninsured_rate_under_19 (SAHIE), a different source.

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. American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. 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). American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs (Counties in Illinois by uninsured rate, all ages (US), 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat

MLA 9

American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs, Counties in Illinois by uninsured rate, all ages (US), 2021. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Invokely, https://invokely.ai/rankings/uninsured-rate/illinois-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. Counties in Illinois by uninsured rate, all ages (US), 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate/illinois-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs, Counties in Illinois by uninsured rate, all ages (US), 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat, via Invokely: https://invokely.ai/rankings/uninsured-rate/illinois-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_illinois_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs: Counties in Illinois by uninsured rate, all ages (US), 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate/illinois-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs: Counties in Illinois by uninsured rate, all ages (US), 2021
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat
L2  - https://invokely.ai/rankings/uninsured-rate/illinois-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate/illinois-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Retrieved 2026-10-12.
ER  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in Illinois by uninsured rate, all ages (US) using official data, and cite the source.
rank_places {"indicator":"uninsured_rate","level":"province","within":"Illinois","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=uninsured_rate&level=province&within=Illinois&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which county has the highest uninsured rate, all ages (US)?

Douglas County, with 16.5% in 2021, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, all ages (US)?

Calhoun County, with 1.3% in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. Retrieved 2026-10-12.

Uninsured rate, all ages (US): other rankings

Counties in Illinois: more rankings