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 2018, at 25%. St. Charles County had the lowest, at 7.5%. The median was 16.1% and the figure for Missouri was 13.6%. Source: the U.S. Census Bureau.

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Highest25McDonald County
Lowest7.5St. Charles County
Median16.1115 counties
Missouri13.6History

Map of counties, 2018

Adair County: 15 %Andrew County: 11 %Atchison County: 14.4 %Audrain County: 14.9 %Barry County: 21.7 %Barton County: 17.8 %Bates County: 15.5 %Benton County: 18.6 %Bollinger County: 18.8 %Boone County: 12.3 %Buchanan County: 14.8 %Butler County: 15.8 %Caldwell County: 14.6 %Callaway County: 14 %Camden County: 18.1 %Cape Girardeau County: 13.5 %Carroll County: 15.4 %Carter County: 19 %Cass County: 12 %Cedar County: 18.8 %Chariton County: 14.8 %Christian County: 13.7 %Clark County: 16.8 %Clay County: 10.7 %Clinton County: 11.1 %Cole County: 11.5 %Cooper County: 13.1 %Crawford County: 17.7 %Dade County: 17.7 %Dallas County: 19.9 %Daviess County: 20.3 %DeKalb County: 13.1 %Dent County: 19.2 %Douglas County: 19.1 %Dunklin County: 19.3 %Franklin County: 13.1 %Gasconade County: 15.1 %Gentry County: 16.4 %Greene County: 14.7 %Grundy County: 16.9 %Harrison County: 16.9 %Henry County: 15.2 %Hickory County: 20.2 %Holt County: 14.4 %Howard County: 15.2 %Howell County: 17 %Iron County: 15.4 %Jackson County: 15 %Jasper County: 18.8 %Jefferson County: 13.3 %Johnson County: 12.2 %Knox County: 20.4 %Laclede County: 16.3 %Lafayette County: 13.1 %Lawrence County: 19 %Lewis County: 13 %Lincoln County: 13.9 %Linn County: 16.6 %Livingston County: 14.4 %McDonald County: 25 %Macon County: 16.1 %Madison County: 16 %Maries County: 17.9 %Marion County: 11.6 %Mercer County: 19.5 %Miller County: 16.6 %Mississippi County: 18.2 %Moniteau County: 17.9 %Monroe County: 15 %Montgomery County: 16.2 %Morgan County: 22.7 %New Madrid County: 16.6 %Newton County: 18.8 %Nodaway County: 13 %Oregon County: 18.3 %Osage County: 12.1 %Ozark County: 20.8 %Pemiscot County: 16.1 %Perry County: 12.9 %Pettis County: 21.4 %Phelps County: 18 %Pike County: 15.6 %Platte County: 8.5 %Polk County: 16.6 %Pulaski County: 13.1 %Putnam County: 15.7 %Ralls County: 13.6 %Randolph County: 14.9 %Ray County: 14.7 %Reynolds County: 17.7 %Ripley County: 19.6 %St. Charles County: 7.5 %St. Clair County: 19.2 %Ste. Genevieve County: 12.4 %St. Francois County: 13.8 %St. Louis County: 10 %Saline County: 15.5 %Schuyler County: 18.1 %Scotland County: 24.1 %Scott County: 13.9 %Shannon County: 21.1 %Shelby County: 17.2 %Stoddard County: 16.9 %Stone County: 17.5 %Sullivan County: 16.8 %Taney County: 20.2 %Texas County: 19.7 %Vernon County: 16.6 %Warren County: 12.3 %Washington County: 16.6 %Wayne County: 18.8 %Webster County: 18.2 %Worth County: 14.1 %Wright County: 21 %St. Louis city: 14.8 %
  • Under 13
  • 13 to 15
  • 15 to 16
  • 16 to 18
  • 18 to 19
  • 19 and over
%, 2018. 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, 2018

McDonald County: 25 %McDonald County25Scotland County: 24.1 %Scotland County24.1Morgan County: 22.7 %Morgan County22.7Barry County: 21.7 %Barry County21.7Pettis County: 21.4 %Pettis County21.4Shannon County: 21.1 %Shannon County21.1Wright County: 21 %Wright County21Ozark County: 20.8 %Ozark County20.8Knox County: 20.4 %Knox County20.4Daviess County: 20.3 %Daviess County20.3Hickory County: 20.2 %Hickory County20.2Taney County: 20.2 %Taney County20.2Dallas County: 19.9 %Dallas County19.9Texas County: 19.7 %Texas County19.7Ripley County: 19.6 %Ripley County19.6Mercer County: 19.5 %Mercer County19.5Dunklin County: 19.3 %Dunklin County19.3Dent County: 19.2 %Dent County19.2St. Clair County: 19.2 %St. Clair County19.2Douglas County: 19.1 %Douglas County19.1Carter County: 19 %Carter County19Lawrence County: 19 %Lawrence County19Bollinger County: 18.8 %Bollinger County18.8Cedar County: 18.8 %Cedar County18.8Jasper County: 18.8 %Jasper County18.8Newton County: 18.8 %Newton County18.8Wayne County: 18.8 %Wayne County18.8Benton County: 18.6 %Benton County18.6Oregon County: 18.3 %Oregon County18.3Mississippi County: 18.2 %Mississippi County18.2Webster County: 18.2 %Webster County18.2Camden County: 18.1 %Camden County18.1Schuyler County: 18.1 %Schuyler County18.1Phelps County: 18 %Phelps County18Maries County: 17.9 %Maries County17.9Moniteau County: 17.9 %Moniteau County17.9Barton County: 17.8 %Barton County17.8Crawford County: 17.7 %Crawford County17.7Dade County: 17.7 %Dade County17.7Reynolds County: 17.7 %Reynolds County17.7McDonald County: 25 %McDonald County25Scotland County: 24.1 %Scotland County24.1Morgan County: 22.7 %Morgan County22.7Barry County: 21.7 %Barry County21.7Pettis County: 21.4 %Pettis County21.4Shannon County: 21.1 %Shannon County21.1Wright County: 21 %Wright County21Ozark County: 20.8 %Ozark County20.8Knox County: 20.4 %Knox County20.4Daviess County: 20.3 %Daviess County20.3Hickory County: 20.2 %Hickory County20.2Taney County: 20.2 %Taney County20.2Dallas County: 19.9 %Dallas County19.9Texas County: 19.7 %Texas County19.7Ripley County: 19.6 %Ripley County19.6Mercer County: 19.5 %Mercer County19.5Dunklin County: 19.3 %Dunklin County19.3Dent County: 19.2 %Dent County19.2St. Clair County: 19.2 %St. Clair County19.2Douglas County: 19.1 %Douglas County19.1Carter County: 19 %Carter County19Lawrence County: 19 %Lawrence County19Bollinger County: 18.8 %Bollinger County18.8Cedar County: 18.8 %Cedar County18.8Jasper County: 18.8 %Jasper County18.8Newton County: 18.8 %Newton County18.8Wayne County: 18.8 %Wayne County18.8Benton County: 18.6 %Benton County18.6Oregon County: 18.3 %Oregon County18.3Mississippi County: 18.2 %Mississippi County18.2Webster County: 18.2 %Webster County18.2Camden County: 18.1 %Camden County18.1Schuyler County: 18.1 %Schuyler County18.1Phelps County: 18 %Phelps County18Maries County: 17.9 %Maries County17.9Moniteau County: 17.9 %Moniteau County17.9Barton County: 17.8 %Barton County17.8Crawford County: 17.7 %Crawford County17.7Dade County: 17.7 %Dade County17.7Reynolds County: 17.7 %Reynolds County17.7
%. 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

RankCounties2018 (%)Change on 2017
1McDonald County25+0.3 pts
2Scotland County24.1-1.4 pts
3Morgan County22.7+0.4 pts
4Barry County21.7+0.8 pts
5Pettis County21.4+3.6 pts
6Shannon County21.1+1.3 pts
7Wright County21+0.7 pts
8Ozark County20.8+0.9 pts
9Knox County20.4+0.7 pts
10Daviess County20.3+1.8 pts
11Hickory County20.2+1.1 pts
11Taney County20.2+0.5 pts
13Dallas County19.9-0.3 pts
14Texas County19.70 pts
15Ripley County19.6+0.5 pts
16Mercer County19.5+1.9 pts
17Dunklin County19.3+2.5 pts
18Dent County19.2-0.5 pts
18St. Clair County19.2+0.3 pts
20Douglas County19.1+0.6 pts
21Carter County19-0.7 pts
21Lawrence County19+2.2 pts
23Bollinger County18.8+1.8 pts
23Cedar County18.8+0.9 pts
23Jasper County18.8+1.3 pts
23Newton County18.8-0.5 pts
23Wayne County18.8+0.7 pts
28Benton County18.6+1.1 pts
29Oregon County18.3+0.6 pts
30Mississippi County18.2+1.3 pts
30Webster County18.20 pts
32Camden County18.1+1.5 pts
32Schuyler County18.1+0.7 pts
34Phelps County18+1.3 pts
35Maries County17.9+0.4 pts
35Moniteau County17.9-0.8 pts
37Barton County17.8+0.4 pts
38Crawford County17.7-0.5 pts
38Dade County17.7+0.1 pts
38Reynolds County17.7-0.1 pts
41Stone County17.5+0.6 pts
42Shelby County17.2+0.8 pts
43Howell County17+1 pts
44Grundy County16.9+0.8 pts
44Harrison County16.9-0.7 pts
44Stoddard County16.9+2.2 pts
47Clark County16.8+0.8 pts
47Sullivan County16.8-1.1 pts
49Linn County16.6+1.5 pts
49Miller County16.6+0.3 pts
49New Madrid County16.6+0.1 pts
49Polk County16.6+0.2 pts
49Vernon County16.6+0.8 pts
49Washington County16.6+0.6 pts
55Gentry County16.4+2 pts
56Laclede County16.3-0.9 pts
57Montgomery County16.2+0.7 pts
58Macon County16.1+1.6 pts
58Pemiscot County16.1+1.1 pts
60Madison County16+0.8 pts
61Butler County15.8-0.1 pts
62Putnam County15.7-0.6 pts
63Pike County15.6+1.2 pts
64Bates County15.5+0.1 pts
64Saline County15.50 pts
66Carroll County15.4-0.7 pts
66Iron County15.40 pts
68Henry County15.2-0.3 pts
68Howard County15.2+0.6 pts
70Gasconade County15.1+1.1 pts
71Adair County15+2.7 pts
71Jackson County15-0.3 pts
71Monroe County15+0.5 pts
74Audrain County14.9-0.3 pts
74Randolph County14.9+0.8 pts
76Buchanan County14.8+0.6 pts
76Chariton County14.8+0.5 pts
76St. Louis city14.80 pts
79Greene County14.7+1.1 pts
79Ray County14.7+1.1 pts
81Caldwell County14.60 pts
82Atchison County14.4+0.7 pts
82Holt County14.4-0.7 pts
82Livingston County14.4-0.3 pts
85Worth County14.1+0.2 pts
86Callaway County14+1.3 pts
87Lincoln County13.9+1.4 pts
87Scott County13.9-1.2 pts
89St. Francois County13.8-0.1 pts
90Christian County13.7+1.2 pts
91Ralls County13.6+1.2 pts
92Cape Girardeau County13.5+1 pts
93Jefferson County13.3+1.2 pts
94Cooper County13.1+0.4 pts
94DeKalb County13.1+0.7 pts
94Franklin County13.1+0.6 pts
94Lafayette County13.1+0.5 pts
94Pulaski County13.1-1.2 pts
99Lewis County13-0.8 pts
99Nodaway County13+0.3 pts
101Perry County12.9+2.6 pts
102Ste. Genevieve County12.4-0.6 pts
103Boone County12.3+0.6 pts
103Warren County12.3-0.3 pts
105Johnson County12.2+0.3 pts
106Osage County12.1+0.5 pts
107Cass County12+1 pts
108Marion County11.6-0.8 pts
109Cole County11.5-0.8 pts
110Clinton County11.1+0.1 pts
111Andrew County11-0.2 pts
112Clay County10.7+0.1 pts
113St. Louis County10+0.2 pts
114Platte County8.5+0.6 pts
115St. Charles County7.5+0.1 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-2018-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), 2018) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2018-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), 2018. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2018-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/missouri-counties?period=2018. 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), 2018. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2018-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/missouri-counties?period=2018.

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), 2018 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2018-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/missouri-counties?period=2018 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_missouri_by_2018,
  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), 2018}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2018-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/missouri-counties?period=2018. 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-2018-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), 2018
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-2018-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/missouri-counties?period=2018
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/missouri-counties?period=2018.
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-2018-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% in 2018, 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 7.5% in 2018.

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