Data / Rankings / Uninsured rate, ages 18 to 64 (US model-based estimate) / Counties in Missouri

Counties in Missouri by uninsured rate, ages 18 to 64 (US model-based estimate)

McDonald County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 115 counties in 2021, at 25.2%. St. Charles County had the lowest, at 7.2%. The median was 16.6% and the figure for Missouri was 13.5%. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest25.2McDonald County
Lowest7.2St. Charles County
Median16.6115 counties
Missouri13.5History

Map of counties, 2021

Adair County: 16 %Andrew County: 12.4 %Atchison County: 16.7 %Audrain County: 15.7 %Barry County: 19.7 %Barton County: 18 %Bates County: 17.5 %Benton County: 17.7 %Bollinger County: 18 %Boone County: 12.7 %Buchanan County: 15.5 %Butler County: 17.5 %Caldwell County: 17.2 %Callaway County: 13.7 %Camden County: 16.9 %Cape Girardeau County: 13.7 %Carroll County: 15.1 %Carter County: 18 %Cass County: 11.3 %Cedar County: 18.3 %Chariton County: 14.6 %Christian County: 13.8 %Clark County: 17.3 %Clay County: 10.1 %Clinton County: 13.3 %Cole County: 12.3 %Cooper County: 12.5 %Crawford County: 18.1 %Dade County: 18 %Dallas County: 19.4 %Daviess County: 18.1 %DeKalb County: 13.3 %Dent County: 17.1 %Douglas County: 17 %Dunklin County: 19.1 %Franklin County: 13.7 %Gasconade County: 15.4 %Gentry County: 19.3 %Greene County: 14.1 %Grundy County: 20.4 %Harrison County: 14.8 %Henry County: 16.3 %Hickory County: 17.4 %Holt County: 14.3 %Howard County: 14.7 %Howell County: 18 %Iron County: 17.4 %Jackson County: 15.9 %Jasper County: 18.9 %Jefferson County: 11.6 %Johnson County: 12.9 %Knox County: 20 %Laclede County: 15.5 %Lafayette County: 13.9 %Lawrence County: 19.6 %Lewis County: 17.4 %Lincoln County: 14.1 %Linn County: 14.9 %Livingston County: 14.9 %McDonald County: 25.2 %Macon County: 15.5 %Madison County: 15.4 %Maries County: 19.5 %Marion County: 14.1 %Mercer County: 17.2 %Miller County: 16.6 %Mississippi County: 17.6 %Moniteau County: 17.4 %Monroe County: 16.4 %Montgomery County: 16.1 %Morgan County: 24.7 %New Madrid County: 17.3 %Newton County: 18.5 %Nodaway County: 11.8 %Oregon County: 18.3 %Osage County: 11 %Ozark County: 21.1 %Pemiscot County: 17.1 %Perry County: 14.2 %Pettis County: 18.3 %Phelps County: 16.8 %Pike County: 15.7 %Platte County: 9.9 %Polk County: 16 %Pulaski County: 13.8 %Putnam County: 14.9 %Ralls County: 12.4 %Randolph County: 13.2 %Ray County: 13.7 %Reynolds County: 19.1 %Ripley County: 18.5 %St. Charles County: 7.2 %St. Clair County: 17.3 %Ste. Genevieve County: 12.6 %St. Francois County: 15.4 %St. Louis County: 9.2 %Saline County: 15.1 %Schuyler County: 15.5 %Scotland County: 23.9 %Scott County: 16.6 %Shannon County: 20 %Shelby County: 17 %Stoddard County: 18.4 %Stone County: 16.4 %Sullivan County: 17.6 %Taney County: 19.1 %Texas County: 20 %Vernon County: 17.2 %Warren County: 13.7 %Washington County: 17.8 %Wayne County: 19.4 %Webster County: 17.4 %Worth County: 14.5 %Wright County: 20.8 %St. Louis city: 14.9 %
  • Under 14
  • 14 to 15
  • 15 to 17
  • 17 to 19
  • 19 and over
%, 2021. 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, 2021

McDonald County: 25.2 %McDonald County25.2Morgan County: 24.7 %Morgan County24.7Scotland County: 23.9 %Scotland County23.9Ozark County: 21.1 %Ozark County21.1Wright County: 20.8 %Wright County20.8Grundy County: 20.4 %Grundy County20.4Knox County: 20 %Knox County20Shannon County: 20 %Shannon County20Texas County: 20 %Texas County20Barry County: 19.7 %Barry County19.7Lawrence County: 19.6 %Lawrence County19.6Maries County: 19.5 %Maries County19.5Dallas County: 19.4 %Dallas County19.4Wayne County: 19.4 %Wayne County19.4Gentry County: 19.3 %Gentry County19.3Dunklin County: 19.1 %Dunklin County19.1Reynolds County: 19.1 %Reynolds County19.1Taney County: 19.1 %Taney County19.1Jasper County: 18.9 %Jasper County18.9Newton County: 18.5 %Newton County18.5Ripley County: 18.5 %Ripley County18.5Stoddard County: 18.4 %Stoddard County18.4Cedar County: 18.3 %Cedar County18.3Oregon County: 18.3 %Oregon County18.3Pettis County: 18.3 %Pettis County18.3Crawford County: 18.1 %Crawford County18.1Daviess County: 18.1 %Daviess County18.1Barton County: 18 %Barton County18Bollinger County: 18 %Bollinger County18Carter County: 18 %Carter County18Dade County: 18 %Dade County18Howell County: 18 %Howell County18Washington County: 17.8 %Washington County17.8Benton County: 17.7 %Benton County17.7Mississippi County: 17.6 %Mississippi County17.6Sullivan County: 17.6 %Sullivan County17.6Bates County: 17.5 %Bates County17.5Butler County: 17.5 %Butler County17.5Hickory County: 17.4 %Hickory County17.4Iron County: 17.4 %Iron County17.4McDonald County: 25.2 %McDonald County25.2Morgan County: 24.7 %Morgan County24.7Scotland County: 23.9 %Scotland County23.9Ozark County: 21.1 %Ozark County21.1Wright County: 20.8 %Wright County20.8Grundy County: 20.4 %Grundy County20.4Knox County: 20 %Knox County20Shannon County: 20 %Shannon County20Texas County: 20 %Texas County20Barry County: 19.7 %Barry County19.7Lawrence County: 19.6 %Lawrence County19.6Maries County: 19.5 %Maries County19.5Dallas County: 19.4 %Dallas County19.4Wayne County: 19.4 %Wayne County19.4Gentry County: 19.3 %Gentry County19.3Dunklin County: 19.1 %Dunklin County19.1Reynolds County: 19.1 %Reynolds County19.1Taney County: 19.1 %Taney County19.1Jasper County: 18.9 %Jasper County18.9Newton County: 18.5 %Newton County18.5Ripley County: 18.5 %Ripley County18.5Stoddard County: 18.4 %Stoddard County18.4Cedar County: 18.3 %Cedar County18.3Oregon County: 18.3 %Oregon County18.3Pettis County: 18.3 %Pettis County18.3Crawford County: 18.1 %Crawford County18.1Daviess County: 18.1 %Daviess County18.1Barton County: 18 %Barton County18Bollinger County: 18 %Bollinger County18Carter County: 18 %Carter County18Dade County: 18 %Dade County18Howell County: 18 %Howell County18Washington County: 17.8 %Washington County17.8Benton County: 17.7 %Benton County17.7Mississippi County: 17.6 %Mississippi County17.6Sullivan County: 17.6 %Sullivan County17.6Bates County: 17.5 %Bates County17.5Butler County: 17.5 %Butler County17.5Hickory County: 17.4 %Hickory County17.4Iron County: 17.4 %Iron County17.4
%. 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

RankCounties2021 (%)Change on 2020
1McDonald County25.2-1.3 pts
2Morgan County24.7-0.3 pts
3Scotland County23.9-1.2 pts
4Ozark County21.1+2.1 pts
5Wright County20.8+0.7 pts
6Grundy County20.4+0.6 pts
7Knox County20+2.1 pts
7Shannon County20-2.4 pts
7Texas County20+0.8 pts
10Barry County19.7-0.4 pts
11Lawrence County19.6-1.6 pts
12Maries County19.5+1.7 pts
13Dallas County19.4-1.1 pts
13Wayne County19.4+1.1 pts
15Gentry County19.3+1.9 pts
16Dunklin County19.1-3 pts
16Reynolds County19.1+0.6 pts
16Taney County19.1-3 pts
19Jasper County18.9-0.6 pts
20Newton County18.5-0.7 pts
20Ripley County18.5-1.1 pts
22Stoddard County18.4-0.9 pts
23Cedar County18.3-1.2 pts
23Oregon County18.3-0.9 pts
23Pettis County18.3-1.2 pts
26Crawford County18.1-0.5 pts
26Daviess County18.1-3.3 pts
28Barton County18-1 pts
28Bollinger County18-1.4 pts
28Carter County18-2.9 pts
28Dade County18+0.2 pts
28Howell County18-0.5 pts
33Washington County17.8-0.1 pts
34Benton County17.7-0.3 pts
35Mississippi County17.6-0.3 pts
35Sullivan County17.6-0.6 pts
37Bates County17.5-0.9 pts
37Butler County17.5-0.8 pts
39Hickory County17.4-2 pts
39Iron County17.4-1.8 pts
39Lewis County17.4+2.8 pts
39Moniteau County17.4-3.6 pts
39Webster County17.4-2.9 pts
44Clark County17.3-1.4 pts
44New Madrid County17.3-0.5 pts
44St. Clair County17.3-1.9 pts
47Caldwell County17.2-1 pts
47Mercer County17.2-2.2 pts
47Vernon County17.2-1.1 pts
50Dent County17.1-2.6 pts
50Pemiscot County17.1-0.2 pts
52Douglas County17-1.2 pts
52Shelby County17+0.2 pts
54Camden County16.9-0.5 pts
55Phelps County16.8-2.7 pts
56Atchison County16.7+0.4 pts
57Miller County16.6-3.6 pts
57Scott County16.6+0.2 pts
59Monroe County16.4-0.5 pts
59Stone County16.4-2.6 pts
61Henry County16.3-1.5 pts
62Montgomery County16.1-0.7 pts
63Adair County16-2.9 pts
63Polk County16-1.2 pts
65Jackson County15.9+0.5 pts
66Audrain County15.7-2.3 pts
66Pike County15.7-1.5 pts
68Buchanan County15.5-0.9 pts
68Laclede County15.5-1.7 pts
68Macon County15.5-0.6 pts
68Schuyler County15.5-2.6 pts
72Gasconade County15.4-0.9 pts
72Madison County15.4-1.5 pts
72St. Francois County15.4-1.3 pts
75Carroll County15.1-1.7 pts
75Saline County15.1-2.4 pts
77Linn County14.9-1.6 pts
77Livingston County14.9-2.3 pts
77Putnam County14.9-1.9 pts
77St. Louis city14.9+1 pts
81Harrison County14.8-1.7 pts
82Howard County14.7+0.4 pts
83Chariton County14.6-1.3 pts
84Worth County14.5-0.9 pts
85Holt County14.3-2.4 pts
86Perry County14.2+0.2 pts
87Greene County14.1-2.3 pts
87Lincoln County14.1+0.3 pts
87Marion County14.1-1.4 pts
90Lafayette County13.9-0.9 pts
91Christian County13.8-2 pts
91Pulaski County13.8-1.2 pts
93Callaway County13.7-1.2 pts
93Cape Girardeau County13.7-0.3 pts
93Franklin County13.7-0.7 pts
93Ray County13.7-1.5 pts
93Warren County13.7-1.5 pts
98Clinton County13.3-1.3 pts
98DeKalb County13.3-0.2 pts
100Randolph County13.2-2.4 pts
101Johnson County12.9-2.1 pts
102Boone County12.7+0.4 pts
103Ste. Genevieve County12.6-1.5 pts
104Cooper County12.5-1.5 pts
105Andrew County12.4-2 pts
105Ralls County12.4-1.6 pts
107Cole County12.3+0.3 pts
108Nodaway County11.8-3 pts
109Jefferson County11.6-1.6 pts
110Cass County11.3-2.7 pts
111Osage County11-1.8 pts
112Clay County10.1-1.8 pts
113Platte County9.9+0.3 pts
114St. Louis County9.2-0.9 pts
115St. Charles County7.2-0.4 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-2021-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 Missouri by uninsured rate, ages 18 to 64 (US model-based estimate), 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-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 Missouri by uninsured rate, ages 18 to 64 (US model-based estimate), 2021. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/missouri-counties?period=2021. 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 Missouri by uninsured rate, ages 18 to 64 (US model-based estimate), 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/missouri-counties?period=2021.

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 Missouri by uninsured rate, ages 18 to 64 (US model-based estimate), 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/missouri-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_missouri_by_2021,
  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 Missouri by uninsured rate, ages 18 to 64 (US model-based estimate), 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2021-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/missouri-counties?period=2021. 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-2021-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 Missouri by uninsured rate, ages 18 to 64 (US model-based estimate), 2021
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-2021-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/missouri-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/missouri-counties?period=2021.
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-2021-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)?

McDonald County, with 25.2% in 2021, according to the U.S. Census Bureau.

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

St. Charles County, with 7.2% 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, 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 Missouri: more rankings