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

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

Davis County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 99 counties in 2021, at 13.9%. Bremer County had the lowest, at 4.4%. The median was 6.9% and the figure for Iowa was 6.9%. Source: the U.S. Census Bureau.

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Highest13.9Davis County
Lowest4.4Bremer County
Median6.999 counties
Iowa6.9History

Map of counties, 2021

Adair County: 6.4 %Adams County: 7.1 %Allamakee County: 9 %Appanoose County: 7.3 %Audubon County: 8 %Benton County: 5.7 %Black Hawk County: 7.5 %Boone County: 5.6 %Bremer County: 4.4 %Buchanan County: 6.3 %Buena Vista County: 13.7 %Butler County: 6.8 %Calhoun County: 6.7 %Carroll County: 6 %Cass County: 8.4 %Cedar County: 5.1 %Cerro Gordo County: 6.2 %Cherokee County: 6.9 %Chickasaw County: 7.3 %Clarke County: 9 %Clay County: 6.9 %Clayton County: 8.4 %Clinton County: 6.6 %Crawford County: 13.6 %Dallas County: 5 %Davis County: 13.9 %Decatur County: 9 %Delaware County: 6.4 %Des Moines County: 6.3 %Dickinson County: 6.2 %Dubuque County: 5.8 %Emmet County: 8.4 %Fayette County: 6.9 %Floyd County: 7.3 %Franklin County: 9.8 %Fremont County: 6.4 %Greene County: 6.8 %Grundy County: 5.3 %Guthrie County: 7.1 %Hamilton County: 7 %Hancock County: 6.7 %Hardin County: 7.5 %Harrison County: 6.6 %Henry County: 6.5 %Howard County: 7.2 %Humboldt County: 6.9 %Ida County: 7.2 %Iowa County: 5.4 %Jackson County: 6.4 %Jasper County: 5.8 %Jefferson County: 9.6 %Johnson County: 6.5 %Jones County: 6.4 %Keokuk County: 7.1 %Kossuth County: 6.7 %Lee County: 6 %Linn County: 5.6 %Louisa County: 10.1 %Lucas County: 7.3 %Lyon County: 7.4 %Madison County: 5.6 %Mahaska County: 6.6 %Marion County: 5 %Marshall County: 11.5 %Mills County: 5.5 %Mitchell County: 7.5 %Monona County: 6.9 %Monroe County: 7 %Montgomery County: 7.1 %Muscatine County: 7.1 %O'Brien County: 6.9 %Osceola County: 8.1 %Page County: 6.4 %Palo Alto County: 6.4 %Plymouth County: 6.7 %Pocahontas County: 9.5 %Polk County: 6.6 %Pottawattamie County: 7.9 %Poweshiek County: 6.1 %Ringgold County: 7.4 %Sac County: 7.2 %Scott County: 6.3 %Shelby County: 7.1 %Sioux County: 7.6 %Story County: 6.2 %Tama County: 9.7 %Taylor County: 9.5 %Union County: 7.6 %Van Buren County: 10.1 %Wapello County: 8.9 %Warren County: 4.5 %Washington County: 9.1 %Wayne County: 9.3 %Webster County: 7.1 %Winnebago County: 6.9 %Winneshiek County: 4.6 %Woodbury County: 11.1 %Worth County: 6.8 %Wright County: 7.5 %
  • Under 6
  • 6 to 6.6
  • 6.6 to 6.9
  • 6.9 to 7.3
  • 7.3 to 9
  • 9 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

Davis County: 13.9 %Davis County13.9Buena Vista County: 13.7 %Buena Vista County13.7Crawford County: 13.6 %Crawford County13.6Marshall County: 11.5 %Marshall County11.5Woodbury County: 11.1 %Woodbury County11.1Louisa County: 10.1 %Louisa County10.1Van Buren County: 10.1 %Van Buren County10.1Franklin County: 9.8 %Franklin County9.8Tama County: 9.7 %Tama County9.7Jefferson County: 9.6 %Jefferson County9.6Pocahontas County: 9.5 %Pocahontas County9.5Taylor County: 9.5 %Taylor County9.5Wayne County: 9.3 %Wayne County9.3Washington County: 9.1 %Washington County9.1Allamakee County: 9 %Allamakee County9Clarke County: 9 %Clarke County9Decatur County: 9 %Decatur County9Wapello County: 8.9 %Wapello County8.9Cass County: 8.4 %Cass County8.4Clayton County: 8.4 %Clayton County8.4Emmet County: 8.4 %Emmet County8.4Osceola County: 8.1 %Osceola County8.1Audubon County: 8 %Audubon County8Pottawattamie County: 7.9 %Pottawattamie County7.9Sioux County: 7.6 %Sioux County7.6Union County: 7.6 %Union County7.6Black Hawk County: 7.5 %Black Hawk County7.5Hardin County: 7.5 %Hardin County7.5Mitchell County: 7.5 %Mitchell County7.5Wright County: 7.5 %Wright County7.5Lyon County: 7.4 %Lyon County7.4Ringgold County: 7.4 %Ringgold County7.4Appanoose County: 7.3 %Appanoose County7.3Chickasaw County: 7.3 %Chickasaw County7.3Floyd County: 7.3 %Floyd County7.3Lucas County: 7.3 %Lucas County7.3Howard County: 7.2 %Howard County7.2Ida County: 7.2 %Ida County7.2Sac County: 7.2 %Sac County7.2Adams County: 7.1 %Adams County7.1Davis County: 13.9 %Davis County13.9Buena Vista County: 13.7 %Buena Vista County13.7Crawford County: 13.6 %Crawford County13.6Marshall County: 11.5 %Marshall County11.5Woodbury County: 11.1 %Woodbury County11.1Louisa County: 10.1 %Louisa County10.1Van Buren County: 10.1 %Van Buren County10.1Franklin County: 9.8 %Franklin County9.8Tama County: 9.7 %Tama County9.7Jefferson County: 9.6 %Jefferson County9.6Pocahontas County: 9.5 %Pocahontas County9.5Taylor County: 9.5 %Taylor County9.5Wayne County: 9.3 %Wayne County9.3Washington County: 9.1 %Washington County9.1Allamakee County: 9 %Allamakee County9Clarke County: 9 %Clarke County9Decatur County: 9 %Decatur County9Wapello County: 8.9 %Wapello County8.9Cass County: 8.4 %Cass County8.4Clayton County: 8.4 %Clayton County8.4Emmet County: 8.4 %Emmet County8.4Osceola County: 8.1 %Osceola County8.1Audubon County: 8 %Audubon County8Pottawattamie County: 7.9 %Pottawattamie County7.9Sioux County: 7.6 %Sioux County7.6Union County: 7.6 %Union County7.6Black Hawk County: 7.5 %Black Hawk County7.5Hardin County: 7.5 %Hardin County7.5Mitchell County: 7.5 %Mitchell County7.5Wright County: 7.5 %Wright County7.5Lyon County: 7.4 %Lyon County7.4Ringgold County: 7.4 %Ringgold County7.4Appanoose County: 7.3 %Appanoose County7.3Chickasaw County: 7.3 %Chickasaw County7.3Floyd County: 7.3 %Floyd County7.3Lucas County: 7.3 %Lucas County7.3Howard County: 7.2 %Howard County7.2Ida County: 7.2 %Ida County7.2Sac County: 7.2 %Sac County7.2Adams County: 7.1 %Adams County7.1
%. 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
1Davis County13.9+1.3 pts
2Buena Vista County13.7-0.1 pts
3Crawford County13.6+0.6 pts
4Marshall County11.5+0.5 pts
5Woodbury County11.1+1.1 pts
6Louisa County10.1+0.3 pts
6Van Buren County10.1+1.3 pts
8Franklin County9.80 pts
9Tama County9.7-0.2 pts
10Jefferson County9.6+0.5 pts
11Pocahontas County9.5+1.1 pts
11Taylor County9.5+0.3 pts
13Wayne County9.3+0.5 pts
14Washington County9.1-0.3 pts
15Allamakee County9-0.6 pts
15Clarke County9+0.1 pts
15Decatur County9+0.6 pts
18Wapello County8.9-0.3 pts
19Cass County8.4-0.7 pts
19Clayton County8.4+0.4 pts
19Emmet County8.4-0.6 pts
22Osceola County8.1-0.6 pts
23Audubon County8-0.2 pts
24Pottawattamie County7.9+1.3 pts
25Sioux County7.6-0.6 pts
25Union County7.6+0.1 pts
27Black Hawk County7.5+0.4 pts
27Hardin County7.5-0.2 pts
27Mitchell County7.5-0.7 pts
27Wright County7.5-0.7 pts
31Lyon County7.4-0.2 pts
31Ringgold County7.4-0.6 pts
33Appanoose County7.30 pts
33Chickasaw County7.3+0.1 pts
33Floyd County7.3-0.1 pts
33Lucas County7.3+0.6 pts
37Howard County7.2-0.1 pts
37Ida County7.20 pts
37Sac County7.2+0.2 pts
40Adams County7.1+0.1 pts
40Guthrie County7.1-0.1 pts
40Keokuk County7.1+0.3 pts
40Montgomery County7.1-0.5 pts
40Muscatine County7.1-0.3 pts
40Shelby County7.1+0.3 pts
40Webster County7.1-0.2 pts
47Hamilton County70 pts
47Monroe County7-0.4 pts
49Cherokee County6.9+0.3 pts
49Clay County6.9-1.5 pts
49Fayette County6.9+0.1 pts
49Humboldt County6.9-1.1 pts
49Monona County6.9-0.1 pts
49O'Brien County6.9-0.2 pts
49Winnebago County6.9+0.7 pts
56Butler County6.8+0.3 pts
56Greene County6.8+0.1 pts
56Worth County6.8-0.4 pts
59Calhoun County6.70 pts
59Hancock County6.7+0.1 pts
59Kossuth County6.7+0.1 pts
59Plymouth County6.7-0.4 pts
63Clinton County6.6-0.2 pts
63Harrison County6.6-0.5 pts
63Mahaska County6.6-0.2 pts
63Polk County6.6-0.5 pts
67Henry County6.5-0.2 pts
67Johnson County6.5-0.4 pts
69Adair County6.4-0.2 pts
69Delaware County6.4+0.6 pts
69Fremont County6.4-0.7 pts
69Jackson County6.4-0.3 pts
69Jones County6.4-0.7 pts
69Page County6.4-0.6 pts
69Palo Alto County6.4-0.7 pts
76Buchanan County6.3-0.1 pts
76Des Moines County6.3+0.5 pts
76Scott County6.3-0.7 pts
79Cerro Gordo County6.2-0.2 pts
79Dickinson County6.20 pts
79Story County6.2-0.4 pts
82Poweshiek County6.1-0.1 pts
83Carroll County6-0.1 pts
83Lee County60 pts
85Dubuque County5.80 pts
85Jasper County5.8+0.5 pts
87Benton County5.7-0.3 pts
88Boone County5.6-0.2 pts
88Linn County5.6-0.6 pts
88Madison County5.6-1.4 pts
91Mills County5.5-0.2 pts
92Iowa County5.4+0.2 pts
93Grundy County5.3-0.7 pts
94Cedar County5.1-0.4 pts
95Dallas County5-0.1 pts
95Marion County5+0.1 pts
97Winneshiek County4.6-0.5 pts
98Warren County4.5-0.6 pts
99Bremer County4.4+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-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 Iowa 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 Iowa 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/iowa-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 Iowa 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/iowa-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 Iowa 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/iowa-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_iowa_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 Iowa 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/iowa-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 Iowa 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/iowa-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/iowa-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)?

Davis County, with 13.9% in 2021, according to the U.S. Census Bureau.

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

Bremer County, with 4.4% 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 Iowa: more rankings