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)

Buena Vista County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 99 counties in 2017, at 13.9%. Grundy County had the lowest, at 4.1%. The median was 6.6% and the figure for Iowa was 6.5%. Source: the U.S. Census Bureau.

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Highest13.9Buena Vista County
Lowest4.1Grundy County
Median6.699 counties
Iowa6.5History

Map of counties, 2017

Adair County: 6.2 %Adams County: 6.8 %Allamakee County: 9 %Appanoose County: 7.3 %Audubon County: 7.6 %Benton County: 5.8 %Black Hawk County: 6.3 %Boone County: 4.9 %Bremer County: 4.6 %Buchanan County: 6.3 %Buena Vista County: 13.9 %Butler County: 6 %Calhoun County: 6.4 %Carroll County: 5.2 %Cass County: 7.9 %Cedar County: 5 %Cerro Gordo County: 5.4 %Cherokee County: 6.9 %Chickasaw County: 7.2 %Clarke County: 7.8 %Clay County: 6.6 %Clayton County: 6.9 %Clinton County: 5.9 %Crawford County: 12.7 %Dallas County: 4.8 %Davis County: 12.1 %Decatur County: 8.4 %Delaware County: 7.1 %Des Moines County: 6.3 %Dickinson County: 5.6 %Dubuque County: 5.3 %Emmet County: 7.9 %Fayette County: 6.3 %Floyd County: 7.5 %Franklin County: 8.8 %Fremont County: 5.6 %Greene County: 6 %Grundy County: 4.1 %Guthrie County: 6.9 %Hamilton County: 6.6 %Hancock County: 6.2 %Hardin County: 6.2 %Harrison County: 6.3 %Henry County: 6.6 %Howard County: 7.5 %Humboldt County: 6.5 %Ida County: 5.5 %Iowa County: 5 %Jackson County: 6.3 %Jasper County: 5.1 %Jefferson County: 8.3 %Johnson County: 6.5 %Jones County: 6 %Keokuk County: 7.3 %Kossuth County: 5.7 %Lee County: 6 %Linn County: 5 %Louisa County: 10.2 %Lucas County: 6.5 %Lyon County: 7.4 %Madison County: 5.6 %Mahaska County: 6 %Marion County: 5.1 %Marshall County: 9.8 %Mills County: 5.3 %Mitchell County: 8 %Monona County: 7.6 %Monroe County: 6.8 %Montgomery County: 7.8 %Muscatine County: 6.2 %O'Brien County: 6.6 %Osceola County: 8.9 %Page County: 7.2 %Palo Alto County: 5.5 %Plymouth County: 6.1 %Pocahontas County: 6.8 %Polk County: 6.7 %Pottawattamie County: 6.7 %Poweshiek County: 6.4 %Ringgold County: 8.4 %Sac County: 6.8 %Scott County: 6.1 %Shelby County: 6 %Sioux County: 8.1 %Story County: 6 %Tama County: 9 %Taylor County: 8 %Union County: 6.9 %Van Buren County: 9 %Wapello County: 8.1 %Warren County: 4.6 %Washington County: 7.1 %Wayne County: 8.6 %Webster County: 7 %Winnebago County: 5.9 %Winneshiek County: 5.3 %Woodbury County: 10.3 %Worth County: 6.4 %Wright County: 8.3 %
  • Under 5.5
  • 5.5 to 6.2
  • 6.2 to 6.6
  • 6.6 to 7.1
  • 7.1 to 8.1
  • 8.1 and over
%, 2017. 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, 2017

Buena Vista County: 13.9 %Buena Vista County13.9Crawford County: 12.7 %Crawford County12.7Davis County: 12.1 %Davis County12.1Woodbury County: 10.3 %Woodbury County10.3Louisa County: 10.2 %Louisa County10.2Marshall County: 9.8 %Marshall County9.8Allamakee County: 9 %Allamakee County9Tama County: 9 %Tama County9Van Buren County: 9 %Van Buren County9Osceola County: 8.9 %Osceola County8.9Franklin County: 8.8 %Franklin County8.8Wayne County: 8.6 %Wayne County8.6Decatur County: 8.4 %Decatur County8.4Ringgold County: 8.4 %Ringgold County8.4Jefferson County: 8.3 %Jefferson County8.3Wright County: 8.3 %Wright County8.3Sioux County: 8.1 %Sioux County8.1Wapello County: 8.1 %Wapello County8.1Mitchell County: 8 %Mitchell County8Taylor County: 8 %Taylor County8Cass County: 7.9 %Cass County7.9Emmet County: 7.9 %Emmet County7.9Clarke County: 7.8 %Clarke County7.8Montgomery County: 7.8 %Montgomery County7.8Audubon County: 7.6 %Audubon County7.6Monona County: 7.6 %Monona County7.6Floyd County: 7.5 %Floyd County7.5Howard County: 7.5 %Howard County7.5Lyon County: 7.4 %Lyon County7.4Appanoose County: 7.3 %Appanoose County7.3Keokuk County: 7.3 %Keokuk County7.3Chickasaw County: 7.2 %Chickasaw County7.2Page County: 7.2 %Page County7.2Delaware County: 7.1 %Delaware County7.1Washington County: 7.1 %Washington County7.1Webster County: 7 %Webster County7Cherokee County: 6.9 %Cherokee County6.9Clayton County: 6.9 %Clayton County6.9Guthrie County: 6.9 %Guthrie County6.9Union County: 6.9 %Union County6.9Buena Vista County: 13.9 %Buena Vista County13.9Crawford County: 12.7 %Crawford County12.7Davis County: 12.1 %Davis County12.1Woodbury County: 10.3 %Woodbury County10.3Louisa County: 10.2 %Louisa County10.2Marshall County: 9.8 %Marshall County9.8Allamakee County: 9 %Allamakee County9Tama County: 9 %Tama County9Van Buren County: 9 %Van Buren County9Osceola County: 8.9 %Osceola County8.9Franklin County: 8.8 %Franklin County8.8Wayne County: 8.6 %Wayne County8.6Decatur County: 8.4 %Decatur County8.4Ringgold County: 8.4 %Ringgold County8.4Jefferson County: 8.3 %Jefferson County8.3Wright County: 8.3 %Wright County8.3Sioux County: 8.1 %Sioux County8.1Wapello County: 8.1 %Wapello County8.1Mitchell County: 8 %Mitchell County8Taylor County: 8 %Taylor County8Cass County: 7.9 %Cass County7.9Emmet County: 7.9 %Emmet County7.9Clarke County: 7.8 %Clarke County7.8Montgomery County: 7.8 %Montgomery County7.8Audubon County: 7.6 %Audubon County7.6Monona County: 7.6 %Monona County7.6Floyd County: 7.5 %Floyd County7.5Howard County: 7.5 %Howard County7.5Lyon County: 7.4 %Lyon County7.4Appanoose County: 7.3 %Appanoose County7.3Keokuk County: 7.3 %Keokuk County7.3Chickasaw County: 7.2 %Chickasaw County7.2Page County: 7.2 %Page County7.2Delaware County: 7.1 %Delaware County7.1Washington County: 7.1 %Washington County7.1Webster County: 7 %Webster County7Cherokee County: 6.9 %Cherokee County6.9Clayton County: 6.9 %Clayton County6.9Guthrie County: 6.9 %Guthrie County6.9Union County: 6.9 %Union County6.9
%. 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

RankCounties2017 (%)Change on 2016
1Buena Vista County13.9+2.5 pts
2Crawford County12.7+1.4 pts
3Davis County12.1+1.7 pts
4Woodbury County10.3+1.2 pts
5Louisa County10.2+1.1 pts
6Marshall County9.8+0.3 pts
7Allamakee County9+0.7 pts
7Tama County9+1.3 pts
7Van Buren County9+1.6 pts
10Osceola County8.9+1.1 pts
11Franklin County8.8+0.8 pts
12Wayne County8.6+0.2 pts
13Decatur County8.4+0.4 pts
13Ringgold County8.4+0.1 pts
15Jefferson County8.3+0.2 pts
15Wright County8.3+0.6 pts
17Sioux County8.1+1.1 pts
17Wapello County8.1-0.6 pts
19Mitchell County8+0.8 pts
19Taylor County8+0.6 pts
21Cass County7.9+1.1 pts
21Emmet County7.9-0.5 pts
23Clarke County7.8+1 pts
23Montgomery County7.8+0.6 pts
25Audubon County7.6+1 pts
25Monona County7.6+1.1 pts
27Floyd County7.5+0.8 pts
27Howard County7.5+0.6 pts
29Lyon County7.4+1.1 pts
30Appanoose County7.3+0.5 pts
30Keokuk County7.3+0.1 pts
32Chickasaw County7.2+1 pts
32Page County7.2+0.8 pts
34Delaware County7.1+1.4 pts
34Washington County7.1+0.9 pts
36Webster County7+1 pts
37Cherokee County6.9+0.4 pts
37Clayton County6.9+0.6 pts
37Guthrie County6.9+0.7 pts
37Union County6.9+1.1 pts
41Adams County6.80 pts
41Monroe County6.8+0.3 pts
41Pocahontas County6.8-0.2 pts
41Sac County6.8+0.7 pts
45Polk County6.7+0.5 pts
45Pottawattamie County6.7+0.5 pts
47Clay County6.6+1.2 pts
47Hamilton County6.6+0.5 pts
47Henry County6.6+1 pts
47O'Brien County6.6+0.7 pts
51Humboldt County6.5+1 pts
51Johnson County6.5+0.2 pts
51Lucas County6.5+0.2 pts
54Calhoun County6.4+0.4 pts
54Poweshiek County6.4+0.3 pts
54Worth County6.4+1.2 pts
57Black Hawk County6.3+0.1 pts
57Buchanan County6.3+0.6 pts
57Des Moines County6.3+0.4 pts
57Fayette County6.3+0.1 pts
57Harrison County6.3+0.5 pts
57Jackson County6.3+0.2 pts
63Adair County6.2+1 pts
63Hancock County6.2+0.5 pts
63Hardin County6.2+0.2 pts
63Muscatine County6.2-0.7 pts
67Plymouth County6.1+0.3 pts
67Scott County6.1+1 pts
69Butler County6+0.8 pts
69Greene County6-0.2 pts
69Jones County6+0.4 pts
69Lee County6+0.9 pts
69Mahaska County6+0.7 pts
69Shelby County6+0.7 pts
69Story County6+0.6 pts
76Clinton County5.9+1 pts
76Winnebago County5.9+1.1 pts
78Benton County5.8+1 pts
79Kossuth County5.7+0.7 pts
80Dickinson County5.6+0.8 pts
80Fremont County5.6+0.4 pts
80Madison County5.6+0.1 pts
83Ida County5.5+0.1 pts
83Palo Alto County5.5-0.2 pts
85Cerro Gordo County5.4+0.5 pts
86Dubuque County5.3+0.3 pts
86Mills County5.3+0.5 pts
86Winneshiek County5.3+0.4 pts
89Carroll County5.2+0.7 pts
90Jasper County5.1+0.4 pts
90Marion County5.1+0.6 pts
92Cedar County5+0.6 pts
92Iowa County5+0.3 pts
92Linn County5+0.7 pts
95Boone County4.9+0.1 pts
96Dallas County4.8+0.2 pts
97Bremer County4.6+0.6 pts
97Warren County4.6+0.7 pts
99Grundy County4.1+0.2 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-2017-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), 2017) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-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), 2017. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/iowa-counties?period=2017. 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), 2017. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/iowa-counties?period=2017.

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), 2017 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/iowa-counties?period=2017 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_iowa_by_2017,
  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), 2017}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/iowa-counties?period=2017. 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-2017-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), 2017
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-2017-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/iowa-counties?period=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/iowa-counties?period=2017.
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-2017-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)?

Buena Vista County, with 13.9% in 2017, according to the U.S. Census Bureau.

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

Grundy County, with 4.1% in 2017.

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