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

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

Davis County had the highest uninsured rate, all ages (US) of 99 counties in 2021, at 29.4%. Warren County had the lowest, at 2.1%. The median was 4.8% and the figure for Iowa was 4.9%. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest29.4Davis County
Lowest2.1Warren County
Median4.899 counties
Iowa4.9History

Map of counties, 2021

Adair County: 5.2 %Adams County: 6 %Allamakee County: 6.8 %Appanoose County: 8.6 %Audubon County: 4.5 %Benton County: 3 %Black Hawk County: 4.5 %Boone County: 3.6 %Bremer County: 2.5 %Buchanan County: 6.1 %Buena Vista County: 7 %Butler County: 4.1 %Calhoun County: 3.6 %Carroll County: 3.1 %Cass County: 4.8 %Cedar County: 2.8 %Cerro Gordo County: 4 %Cherokee County: 5.8 %Chickasaw County: 7.8 %Clarke County: 5.9 %Clay County: 5.2 %Clayton County: 6.7 %Clinton County: 5.1 %Crawford County: 10.1 %Dallas County: 4.4 %Davis County: 29.4 %Decatur County: 7.7 %Delaware County: 3 %Des Moines County: 4 %Dickinson County: 5 %Dubuque County: 3.4 %Emmet County: 4.5 %Fayette County: 5 %Floyd County: 6.1 %Franklin County: 11.5 %Fremont County: 3.7 %Greene County: 3.2 %Grundy County: 2.9 %Guthrie County: 3.8 %Hamilton County: 3.7 %Hancock County: 4.2 %Hardin County: 4.3 %Harrison County: 3.7 %Henry County: 3.6 %Howard County: 8.5 %Humboldt County: 5.4 %Ida County: 5.2 %Iowa County: 2.7 %Jackson County: 4.4 %Jasper County: 3 %Jefferson County: 5.5 %Johnson County: 5.1 %Jones County: 2.5 %Keokuk County: 2.8 %Kossuth County: 4.3 %Lee County: 4.6 %Linn County: 4 %Louisa County: 5.9 %Lucas County: 7.4 %Lyon County: 4.6 %Madison County: 3.1 %Mahaska County: 5.1 %Marion County: 4 %Marshall County: 6.2 %Mills County: 3.2 %Mitchell County: 6.6 %Monona County: 5 %Monroe County: 4.2 %Montgomery County: 3.5 %Muscatine County: 3.8 %O'Brien County: 3.5 %Osceola County: 5.8 %Page County: 4.3 %Palo Alto County: 4.1 %Plymouth County: 5.6 %Pocahontas County: 4.8 %Polk County: 4.7 %Pottawattamie County: 5.4 %Poweshiek County: 4.1 %Ringgold County: 6.7 %Sac County: 4.6 %Scott County: 5.1 %Shelby County: 5.1 %Sioux County: 5.5 %Story County: 5.4 %Tama County: 7.6 %Taylor County: 6.4 %Union County: 8.2 %Van Buren County: 13.5 %Wapello County: 6.5 %Warren County: 2.1 %Washington County: 6.7 %Wayne County: 9.7 %Webster County: 6.7 %Winnebago County: 3.5 %Winneshiek County: 2.5 %Woodbury County: 6.6 %Worth County: 5.9 %Wright County: 4 %
  • Under 3.5
  • 3.5 to 4.1
  • 4.1 to 4.8
  • 4.8 to 5.5
  • 5.5 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

Davis County: 29.4 %Davis County29.4Van Buren County: 13.5 %Van Buren County13.5Franklin County: 11.5 %Franklin County11.5Crawford County: 10.1 %Crawford County10.1Wayne County: 9.7 %Wayne County9.7Appanoose County: 8.6 %Appanoose County8.6Howard County: 8.5 %Howard County8.5Union County: 8.2 %Union County8.2Chickasaw County: 7.8 %Chickasaw County7.8Decatur County: 7.7 %Decatur County7.7Tama County: 7.6 %Tama County7.6Lucas County: 7.4 %Lucas County7.4Buena Vista County: 7 %Buena Vista County7Allamakee County: 6.8 %Allamakee County6.8Ringgold County: 6.7 %Ringgold County6.7Webster County: 6.7 %Webster County6.7Clayton County: 6.7 %Clayton County6.7Washington County: 6.7 %Washington County6.7Woodbury County: 6.6 %Woodbury County6.6Mitchell County: 6.6 %Mitchell County6.6Wapello County: 6.5 %Wapello County6.5Taylor County: 6.4 %Taylor County6.4Marshall County: 6.2 %Marshall County6.2Floyd County: 6.1 %Floyd County6.1Buchanan County: 6.1 %Buchanan County6.1Adams County: 6 %Adams County6Worth County: 5.9 %Worth County5.9Clarke County: 5.9 %Clarke County5.9Louisa County: 5.9 %Louisa County5.9Cherokee County: 5.8 %Cherokee County5.8Osceola County: 5.8 %Osceola County5.8Plymouth County: 5.6 %Plymouth County5.6Sioux County: 5.5 %Sioux County5.5Jefferson County: 5.5 %Jefferson County5.5Humboldt County: 5.4 %Humboldt County5.4Pottawattamie County: 5.4 %Pottawattamie County5.4Story County: 5.4 %Story County5.4Clay County: 5.2 %Clay County5.2Adair County: 5.2 %Adair County5.2Ida County: 5.2 %Ida County5.2Davis County: 29.4 %Davis County29.4Van Buren County: 13.5 %Van Buren County13.5Franklin County: 11.5 %Franklin County11.5Crawford County: 10.1 %Crawford County10.1Wayne County: 9.7 %Wayne County9.7Appanoose County: 8.6 %Appanoose County8.6Howard County: 8.5 %Howard County8.5Union County: 8.2 %Union County8.2Chickasaw County: 7.8 %Chickasaw County7.8Decatur County: 7.7 %Decatur County7.7Tama County: 7.6 %Tama County7.6Lucas County: 7.4 %Lucas County7.4Buena Vista County: 7 %Buena Vista County7Allamakee County: 6.8 %Allamakee County6.8Ringgold County: 6.7 %Ringgold County6.7Webster County: 6.7 %Webster County6.7Clayton County: 6.7 %Clayton County6.7Washington County: 6.7 %Washington County6.7Woodbury County: 6.6 %Woodbury County6.6Mitchell County: 6.6 %Mitchell County6.6Wapello County: 6.5 %Wapello County6.5Taylor County: 6.4 %Taylor County6.4Marshall County: 6.2 %Marshall County6.2Floyd County: 6.1 %Floyd County6.1Buchanan County: 6.1 %Buchanan County6.1Adams County: 6 %Adams County6Worth County: 5.9 %Worth County5.9Clarke County: 5.9 %Clarke County5.9Louisa County: 5.9 %Louisa County5.9Cherokee County: 5.8 %Cherokee County5.8Osceola County: 5.8 %Osceola County5.8Plymouth County: 5.6 %Plymouth County5.6Sioux County: 5.5 %Sioux County5.5Jefferson County: 5.5 %Jefferson County5.5Humboldt County: 5.4 %Humboldt County5.4Pottawattamie County: 5.4 %Pottawattamie County5.4Story County: 5.4 %Story County5.4Clay County: 5.2 %Clay County5.2Adair County: 5.2 %Adair County5.2Ida County: 5.2 %Ida County5.2
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Davis County29.4
2Van Buren County13.5
3Franklin County11.5
4Crawford County10.1
5Wayne County9.7
6Appanoose County8.6
7Howard County8.5
8Union County8.2
9Chickasaw County7.8
10Decatur County7.7
11Tama County7.6
12Lucas County7.4
13Buena Vista County7
14Allamakee County6.8
15Ringgold County6.7
16Webster County6.7
17Clayton County6.7
18Washington County6.7
19Woodbury County6.6
20Mitchell County6.6
21Wapello County6.5
22Taylor County6.4
23Marshall County6.2
24Floyd County6.1
25Buchanan County6.1
26Adams County6
27Worth County5.9
28Clarke County5.9
28Louisa County5.9
30Cherokee County5.8
31Osceola County5.8
32Plymouth County5.6
33Sioux County5.5
34Jefferson County5.5
35Humboldt County5.4
36Pottawattamie County5.4
36Story County5.4
38Clay County5.2
39Adair County5.2
40Ida County5.2
41Mahaska County5.1
42Shelby County5.1
43Clinton County5.1
43Johnson County5.1
43Scott County5.1
46Dickinson County5
47Fayette County5
47Monona County5
49Cass County4.8
49Pocahontas County4.8
51Polk County4.7
52Lyon County4.6
53Lee County4.6
54Sac County4.6
55Audubon County4.5
56Black Hawk County4.5
57Emmet County4.5
58Jackson County4.4
59Dallas County4.4
60Page County4.3
61Kossuth County4.3
62Hardin County4.3
63Hancock County4.2
63Monroe County4.2
65Poweshiek County4.1
66Palo Alto County4.1
67Butler County4.1
68Wright County4
69Marion County4
70Linn County4
71Cerro Gordo County4
71Des Moines County4
73Guthrie County3.8
74Muscatine County3.8
75Fremont County3.7
76Hamilton County3.7
76Harrison County3.7
78Boone County3.6
79Calhoun County3.6
80Henry County3.6
81Montgomery County3.5
82Winnebago County3.5
83O'Brien County3.5
84Dubuque County3.4
85Greene County3.2
86Mills County3.2
87Carroll County3.1
88Madison County3.1
89Jasper County3
90Benton County3
91Delaware County3
92Grundy County2.9
93Keokuk County2.8
94Cedar County2.8
95Iowa County2.7
96Bremer County2.5
97Winneshiek County2.5
98Jones County2.5
99Warren County2.1

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 Iowa 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 Iowa 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/iowa-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 Iowa 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/iowa-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 Iowa 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/iowa-counties?period=2021 (Accessed: 12 October 2026).

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

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

Davis County, with 29.4% in 2021, according to the U.S. Census Bureau.

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

Warren County, with 2.1% 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 Iowa: more rankings