Data / Rankings / Uninsured rate, ages 19 to 34 (US, ACS) / Counties in Missouri

Counties in Missouri by uninsured rate, ages 19 to 34 (US, ACS)

Knox County had the highest uninsured rate, ages 19 to 34 (US, ACS) of 115 counties in 2021, at 47.3%. St. Charles County had the lowest, at 6.9%. The median was 22.6% and the figure for Missouri was 16.9%. Source: the U.S. Census Bureau.

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Highest47.3Knox County
Lowest6.9St. Charles County
Median22.6115 counties
Missouri16.9History

Map of counties, 2021

Adair County: 13.2 %Andrew County: 14.1 %Atchison County: 26.3 %Audrain County: 24.5 %Barry County: 23.7 %Barton County: 23.4 %Bates County: 17.2 %Benton County: 28.9 %Bollinger County: 23.8 %Boone County: 10.7 %Buchanan County: 23.4 %Butler County: 25.3 %Caldwell County: 25.2 %Callaway County: 16.1 %Camden County: 30 %Cape Girardeau County: 14 %Carroll County: 20.9 %Carter County: 40.1 %Cass County: 18.2 %Cedar County: 34.1 %Chariton County: 16.9 %Christian County: 16.7 %Clark County: 23.2 %Clay County: 14 %Clinton County: 16.4 %Cole County: 14.1 %Cooper County: 18.7 %Crawford County: 24.2 %Dade County: 31.5 %Dallas County: 30.5 %Daviess County: 24.8 %DeKalb County: 16.9 %Dent County: 29.3 %Douglas County: 30 %Dunklin County: 37.4 %Franklin County: 14.3 %Gasconade County: 14.6 %Gentry County: 21.2 %Greene County: 20 %Grundy County: 28 %Harrison County: 14 %Henry County: 25.4 %Hickory County: 24.6 %Holt County: 21.2 %Howard County: 18 %Howell County: 28.4 %Iron County: 25.6 %Jackson County: 19.2 %Jasper County: 23.6 %Jefferson County: 15.1 %Johnson County: 13 %Knox County: 47.3 %Laclede County: 19 %Lafayette County: 15.5 %Lawrence County: 26.2 %Lewis County: 14.8 %Lincoln County: 13.9 %Linn County: 17.9 %Livingston County: 20.6 %McDonald County: 30.4 %Macon County: 20.8 %Madison County: 22.8 %Maries County: 29.1 %Marion County: 15.9 %Mercer County: 38 %Miller County: 22.6 %Mississippi County: 30.5 %Moniteau County: 28.4 %Monroe County: 26.3 %Montgomery County: 17 %Morgan County: 39.6 %New Madrid County: 28.9 %Newton County: 24.9 %Nodaway County: 12.9 %Oregon County: 35.9 %Osage County: 9.3 %Ozark County: 34.4 %Pemiscot County: 30.5 %Perry County: 11.5 %Pettis County: 24.6 %Phelps County: 14.5 %Pike County: 11.6 %Platte County: 10.7 %Polk County: 22.2 %Pulaski County: 21.5 %Putnam County: 24.3 %Ralls County: 16.5 %Randolph County: 22.1 %Ray County: 27.5 %Reynolds County: 32.1 %Ripley County: 23.5 %St. Charles County: 6.9 %St. Clair County: 23.2 %Ste. Genevieve County: 7.8 %St. Francois County: 21.9 %St. Louis County: 12.3 %Saline County: 10.6 %Schuyler County: 46.3 %Scotland County: 45.3 %Scott County: 27.8 %Shannon County: 35.5 %Shelby County: 21.4 %Stoddard County: 22.4 %Stone County: 26 %Sullivan County: 20.8 %Taney County: 25.3 %Texas County: 33.5 %Vernon County: 23.5 %Warren County: 12.7 %Washington County: 21.4 %Wayne County: 26.1 %Webster County: 20.2 %Worth County: 12.2 %Wright County: 34 %St. Louis city: 15.3 %
  • Under 14
  • 14 to 18
  • 18 to 23
  • 23 to 25
  • 25 to 30
  • 30 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

Knox County: 47.3 %Knox County47.3Schuyler County: 46.3 %Schuyler County46.3Scotland County: 45.3 %Scotland County45.3Carter County: 40.1 %Carter County40.1Morgan County: 39.6 %Morgan County39.6Mercer County: 38 %Mercer County38Dunklin County: 37.4 %Dunklin County37.4Oregon County: 35.9 %Oregon County35.9Shannon County: 35.5 %Shannon County35.5Ozark County: 34.4 %Ozark County34.4Cedar County: 34.1 %Cedar County34.1Wright County: 34 %Wright County34Texas County: 33.5 %Texas County33.5Reynolds County: 32.1 %Reynolds County32.1Dade County: 31.5 %Dade County31.5Pemiscot County: 30.5 %Pemiscot County30.5Dallas County: 30.5 %Dallas County30.5Mississippi County: 30.5 %Mississippi County30.5McDonald County: 30.4 %McDonald County30.4Camden County: 30 %Camden County30Douglas County: 30 %Douglas County30Dent County: 29.3 %Dent County29.3Maries County: 29.1 %Maries County29.1New Madrid County: 28.9 %New Madrid County28.9Benton County: 28.9 %Benton County28.9Moniteau County: 28.4 %Moniteau County28.4Howell County: 28.4 %Howell County28.4Grundy County: 28 %Grundy County28Scott County: 27.8 %Scott County27.8Ray County: 27.5 %Ray County27.5Monroe County: 26.3 %Monroe County26.3Atchison County: 26.3 %Atchison County26.3Lawrence County: 26.2 %Lawrence County26.2Wayne County: 26.1 %Wayne County26.1Stone County: 26 %Stone County26Iron County: 25.6 %Iron County25.6Henry County: 25.4 %Henry County25.4Butler County: 25.3 %Butler County25.3Taney County: 25.3 %Taney County25.3Caldwell County: 25.2 %Caldwell County25.2Knox County: 47.3 %Knox County47.3Schuyler County: 46.3 %Schuyler County46.3Scotland County: 45.3 %Scotland County45.3Carter County: 40.1 %Carter County40.1Morgan County: 39.6 %Morgan County39.6Mercer County: 38 %Mercer County38Dunklin County: 37.4 %Dunklin County37.4Oregon County: 35.9 %Oregon County35.9Shannon County: 35.5 %Shannon County35.5Ozark County: 34.4 %Ozark County34.4Cedar County: 34.1 %Cedar County34.1Wright County: 34 %Wright County34Texas County: 33.5 %Texas County33.5Reynolds County: 32.1 %Reynolds County32.1Dade County: 31.5 %Dade County31.5Pemiscot County: 30.5 %Pemiscot County30.5Dallas County: 30.5 %Dallas County30.5Mississippi County: 30.5 %Mississippi County30.5McDonald County: 30.4 %McDonald County30.4Camden County: 30 %Camden County30Douglas County: 30 %Douglas County30Dent County: 29.3 %Dent County29.3Maries County: 29.1 %Maries County29.1New Madrid County: 28.9 %New Madrid County28.9Benton County: 28.9 %Benton County28.9Moniteau County: 28.4 %Moniteau County28.4Howell County: 28.4 %Howell County28.4Grundy County: 28 %Grundy County28Scott County: 27.8 %Scott County27.8Ray County: 27.5 %Ray County27.5Monroe County: 26.3 %Monroe County26.3Atchison County: 26.3 %Atchison County26.3Lawrence County: 26.2 %Lawrence County26.2Wayne County: 26.1 %Wayne County26.1Stone County: 26 %Stone County26Iron County: 25.6 %Iron County25.6Henry County: 25.4 %Henry County25.4Butler County: 25.3 %Butler County25.3Taney County: 25.3 %Taney County25.3Caldwell County: 25.2 %Caldwell County25.2
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Knox County47.3
2Schuyler County46.3
3Scotland County45.3
4Carter County40.1
5Morgan County39.6
6Mercer County38
7Dunklin County37.4
8Oregon County35.9
9Shannon County35.5
10Ozark County34.4
11Cedar County34.1
12Wright County34
13Texas County33.5
14Reynolds County32.1
15Dade County31.5
16Pemiscot County30.5
17Dallas County30.5
18Mississippi County30.5
19McDonald County30.4
20Camden County30
20Douglas County30
22Dent County29.3
23Maries County29.1
24New Madrid County28.9
25Benton County28.9
26Moniteau County28.4
27Howell County28.4
28Grundy County28
29Scott County27.8
30Ray County27.5
31Monroe County26.3
32Atchison County26.3
33Lawrence County26.2
34Wayne County26.1
35Stone County26
36Iron County25.6
37Henry County25.4
38Butler County25.3
39Taney County25.3
40Caldwell County25.2
41Newton County24.9
42Daviess County24.8
43Hickory County24.6
44Pettis County24.6
45Audrain County24.5
46Putnam County24.3
47Crawford County24.2
48Bollinger County23.8
49Barry County23.7
50Jasper County23.6
51Ripley County23.5
52Vernon County23.5
53Buchanan County23.4
54Barton County23.4
55Clark County23.2
55St. Clair County23.2
57Madison County22.8
58Miller County22.6
59Stoddard County22.4
60Polk County22.2
61Randolph County22.1
62St. Francois County21.9
63Pulaski County21.5
64Washington County21.4
65Shelby County21.4
66Gentry County21.2
67Holt County21.2
68Carroll County20.9
69Sullivan County20.8
70Macon County20.8
71Livingston County20.6
72Webster County20.2
73Greene County20
74Jackson County19.2
75Laclede County19
76Cooper County18.7
77Cass County18.2
78Howard County18
79Linn County17.9
80Bates County17.2
81Montgomery County17
82Chariton County16.9
82DeKalb County16.9
84Christian County16.7
85Ralls County16.5
86Clinton County16.4
87Callaway County16.1
88Marion County15.9
89Lafayette County15.5
90St. Louis city15.3
91Jefferson County15.1
92Lewis County14.8
93Gasconade County14.6
94Phelps County14.5
95Franklin County14.3
96Andrew County14.1
97Cole County14.1
98Cape Girardeau County14
99Harrison County14
100Clay County14
101Lincoln County13.9
102Adair County13.2
103Johnson County13
104Nodaway County12.9
105Warren County12.7
106St. Louis County12.3
107Worth County12.2
108Pike County11.6
109Perry County11.5
110Boone County10.7
111Platte County10.7
112Saline County10.6
113Osage County9.3
114Ste. Genevieve County7.8
115St. Charles County6.9

Other periods

About this ranking

People aged 19 to 34 without health insurance coverage of any kind, as a percentage of the civilian noninstitutionalized population aged 19 to 34. 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 aged 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, 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 aged 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, calculated with stored inputs (Counties in Missouri by uninsured rate, ages 19 to 34 (US, ACS), 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 aged 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, calculated with stored inputs, Counties in Missouri by uninsured rate, ages 19 to 34 (US, ACS), 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-ages-19-34/missouri-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B27010: people aged 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, calculated with stored inputs. Counties in Missouri by uninsured rate, ages 19 to 34 (US, ACS), 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-ages-19-34/missouri-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B27010: people aged 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, calculated with stored inputs, Counties in Missouri by uninsured rate, ages 19 to 34 (US, ACS), 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-ages-19-34/missouri-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_missouri_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B27010: people aged 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, calculated with stored inputs: Counties in Missouri by uninsured rate, ages 19 to 34 (US, ACS), 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-ages-19-34/missouri-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, 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 aged 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, calculated with stored inputs: Counties in Missouri by uninsured rate, ages 19 to 34 (US, ACS), 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-ages-19-34/missouri-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-19-34/missouri-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, 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  -
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Rank Counties in Missouri by uninsured rate, ages 19 to 34 (US, ACS) using official data, and cite the source.
rank_places {"indicator":"uninsured_rate_19_34","level":"province","within":"Missouri","limit":10}
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Questions

Which county has the highest uninsured rate, ages 19 to 34 (US, ACS)?

Knox County, with 47.3% in 2021, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, ages 19 to 34 (US, ACS)?

St. Charles County, with 6.9% 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 aged 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, calculated with stored inputs. Retrieved 2026-10-12.

Uninsured rate, ages 19 to 34 (US, ACS): other rankings

Counties in Missouri: more rankings