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)

Crawford County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 99 counties in 2018, at 13.7%. Bremer County had the lowest, at 4.4%. The median was 6.8% and the figure for Iowa was 6.8%. Source: the U.S. Census Bureau.

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Highest13.7Crawford County
Lowest4.4Bremer County
Median6.899 counties
Iowa6.8History

Map of counties, 2018

Adair County: 6.1 %Adams County: 7.5 %Allamakee County: 11 %Appanoose County: 7.3 %Audubon County: 8 %Benton County: 5.5 %Black Hawk County: 6.8 %Boone County: 5.4 %Bremer County: 4.4 %Buchanan County: 6.4 %Buena Vista County: 12.6 %Butler County: 6.2 %Calhoun County: 6.8 %Carroll County: 5.6 %Cass County: 8.5 %Cedar County: 5.2 %Cerro Gordo County: 5.8 %Cherokee County: 7.1 %Chickasaw County: 7.9 %Clarke County: 7.8 %Clay County: 6.3 %Clayton County: 7.4 %Clinton County: 6.3 %Crawford County: 13.7 %Dallas County: 4.6 %Davis County: 12.6 %Decatur County: 9.3 %Delaware County: 6.7 %Des Moines County: 5.9 %Dickinson County: 5.8 %Dubuque County: 5.5 %Emmet County: 8.4 %Fayette County: 7.4 %Floyd County: 8.1 %Franklin County: 9 %Fremont County: 5.7 %Greene County: 6.5 %Grundy County: 4.5 %Guthrie County: 6.8 %Hamilton County: 6.5 %Hancock County: 6.1 %Hardin County: 6.6 %Harrison County: 6.2 %Henry County: 6.7 %Howard County: 7.9 %Humboldt County: 7.8 %Ida County: 5.9 %Iowa County: 5.1 %Jackson County: 6.5 %Jasper County: 5.2 %Jefferson County: 8.9 %Johnson County: 6.7 %Jones County: 6.5 %Keokuk County: 7.4 %Kossuth County: 6 %Lee County: 5.9 %Linn County: 5.2 %Louisa County: 11.1 %Lucas County: 6.1 %Lyon County: 7.8 %Madison County: 5.7 %Mahaska County: 6.5 %Marion County: 5 %Marshall County: 9.5 %Mills County: 5.8 %Mitchell County: 8.3 %Monona County: 7.5 %Monroe County: 7 %Montgomery County: 7.2 %Muscatine County: 6.9 %O'Brien County: 6.9 %Osceola County: 8.7 %Page County: 7.2 %Palo Alto County: 5.9 %Plymouth County: 6 %Pocahontas County: 8.3 %Polk County: 7.1 %Pottawattamie County: 7.4 %Poweshiek County: 6.4 %Ringgold County: 7.9 %Sac County: 7 %Scott County: 6.4 %Shelby County: 7.3 %Sioux County: 8.1 %Story County: 6.6 %Tama County: 9.5 %Taylor County: 8.4 %Union County: 7.3 %Van Buren County: 10.2 %Wapello County: 8.8 %Warren County: 4.6 %Washington County: 8.1 %Wayne County: 9 %Webster County: 6.6 %Winnebago County: 6.2 %Winneshiek County: 5 %Woodbury County: 10.4 %Worth County: 6.5 %Wright County: 8.8 %
  • Under 5.8
  • 5.8 to 6.4
  • 6.4 to 6.8
  • 6.8 to 7.4
  • 7.4 to 8.5
  • 8.5 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

Crawford County: 13.7 %Crawford County13.7Buena Vista County: 12.6 %Buena Vista County12.6Davis County: 12.6 %Davis County12.6Louisa County: 11.1 %Louisa County11.1Allamakee County: 11 %Allamakee County11Woodbury County: 10.4 %Woodbury County10.4Van Buren County: 10.2 %Van Buren County10.2Marshall County: 9.5 %Marshall County9.5Tama County: 9.5 %Tama County9.5Decatur County: 9.3 %Decatur County9.3Franklin County: 9 %Franklin County9Wayne County: 9 %Wayne County9Jefferson County: 8.9 %Jefferson County8.9Wapello County: 8.8 %Wapello County8.8Wright County: 8.8 %Wright County8.8Osceola County: 8.7 %Osceola County8.7Cass County: 8.5 %Cass County8.5Emmet County: 8.4 %Emmet County8.4Taylor County: 8.4 %Taylor County8.4Mitchell County: 8.3 %Mitchell County8.3Pocahontas County: 8.3 %Pocahontas County8.3Floyd County: 8.1 %Floyd County8.1Sioux County: 8.1 %Sioux County8.1Washington County: 8.1 %Washington County8.1Audubon County: 8 %Audubon County8Chickasaw County: 7.9 %Chickasaw County7.9Howard County: 7.9 %Howard County7.9Ringgold County: 7.9 %Ringgold County7.9Clarke County: 7.8 %Clarke County7.8Humboldt County: 7.8 %Humboldt County7.8Lyon County: 7.8 %Lyon County7.8Adams County: 7.5 %Adams County7.5Monona County: 7.5 %Monona County7.5Clayton County: 7.4 %Clayton County7.4Fayette County: 7.4 %Fayette County7.4Keokuk County: 7.4 %Keokuk County7.4Pottawattamie County: 7.4 %Pottawattamie County7.4Appanoose County: 7.3 %Appanoose County7.3Shelby County: 7.3 %Shelby County7.3Union County: 7.3 %Union County7.3Crawford County: 13.7 %Crawford County13.7Buena Vista County: 12.6 %Buena Vista County12.6Davis County: 12.6 %Davis County12.6Louisa County: 11.1 %Louisa County11.1Allamakee County: 11 %Allamakee County11Woodbury County: 10.4 %Woodbury County10.4Van Buren County: 10.2 %Van Buren County10.2Marshall County: 9.5 %Marshall County9.5Tama County: 9.5 %Tama County9.5Decatur County: 9.3 %Decatur County9.3Franklin County: 9 %Franklin County9Wayne County: 9 %Wayne County9Jefferson County: 8.9 %Jefferson County8.9Wapello County: 8.8 %Wapello County8.8Wright County: 8.8 %Wright County8.8Osceola County: 8.7 %Osceola County8.7Cass County: 8.5 %Cass County8.5Emmet County: 8.4 %Emmet County8.4Taylor County: 8.4 %Taylor County8.4Mitchell County: 8.3 %Mitchell County8.3Pocahontas County: 8.3 %Pocahontas County8.3Floyd County: 8.1 %Floyd County8.1Sioux County: 8.1 %Sioux County8.1Washington County: 8.1 %Washington County8.1Audubon County: 8 %Audubon County8Chickasaw County: 7.9 %Chickasaw County7.9Howard County: 7.9 %Howard County7.9Ringgold County: 7.9 %Ringgold County7.9Clarke County: 7.8 %Clarke County7.8Humboldt County: 7.8 %Humboldt County7.8Lyon County: 7.8 %Lyon County7.8Adams County: 7.5 %Adams County7.5Monona County: 7.5 %Monona County7.5Clayton County: 7.4 %Clayton County7.4Fayette County: 7.4 %Fayette County7.4Keokuk County: 7.4 %Keokuk County7.4Pottawattamie County: 7.4 %Pottawattamie County7.4Appanoose County: 7.3 %Appanoose County7.3Shelby County: 7.3 %Shelby County7.3Union County: 7.3 %Union County7.3
%. 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
1Crawford County13.7+1 pts
2Buena Vista County12.6-1.3 pts
2Davis County12.6+0.5 pts
4Louisa County11.1+0.9 pts
5Allamakee County11+2 pts
6Woodbury County10.4+0.1 pts
7Van Buren County10.2+1.2 pts
8Marshall County9.5-0.3 pts
8Tama County9.5+0.5 pts
10Decatur County9.3+0.9 pts
11Franklin County9+0.2 pts
11Wayne County9+0.4 pts
13Jefferson County8.9+0.6 pts
14Wapello County8.8+0.7 pts
14Wright County8.8+0.5 pts
16Osceola County8.7-0.2 pts
17Cass County8.5+0.6 pts
18Emmet County8.4+0.5 pts
18Taylor County8.4+0.4 pts
20Mitchell County8.3+0.3 pts
20Pocahontas County8.3+1.5 pts
22Floyd County8.1+0.6 pts
22Sioux County8.10 pts
22Washington County8.1+1 pts
25Audubon County8+0.4 pts
26Chickasaw County7.9+0.7 pts
26Howard County7.9+0.4 pts
26Ringgold County7.9-0.5 pts
29Clarke County7.80 pts
29Humboldt County7.8+1.3 pts
29Lyon County7.8+0.4 pts
32Adams County7.5+0.7 pts
32Monona County7.5-0.1 pts
34Clayton County7.4+0.5 pts
34Fayette County7.4+1.1 pts
34Keokuk County7.4+0.1 pts
34Pottawattamie County7.4+0.7 pts
38Appanoose County7.30 pts
38Shelby County7.3+1.3 pts
38Union County7.3+0.4 pts
41Montgomery County7.2-0.6 pts
41Page County7.20 pts
43Cherokee County7.1+0.2 pts
43Polk County7.1+0.4 pts
45Monroe County7+0.2 pts
45Sac County7+0.2 pts
47Muscatine County6.9+0.7 pts
47O'Brien County6.9+0.3 pts
49Black Hawk County6.8+0.5 pts
49Calhoun County6.8+0.4 pts
49Guthrie County6.8-0.1 pts
52Delaware County6.7-0.4 pts
52Henry County6.7+0.1 pts
52Johnson County6.7+0.2 pts
55Hardin County6.6+0.4 pts
55Story County6.6+0.6 pts
55Webster County6.6-0.4 pts
58Greene County6.5+0.5 pts
58Hamilton County6.5-0.1 pts
58Jackson County6.5+0.2 pts
58Jones County6.5+0.5 pts
58Mahaska County6.5+0.5 pts
58Worth County6.5+0.1 pts
64Buchanan County6.4+0.1 pts
64Poweshiek County6.40 pts
64Scott County6.4+0.3 pts
67Clay County6.3-0.3 pts
67Clinton County6.3+0.4 pts
69Butler County6.2+0.2 pts
69Harrison County6.2-0.1 pts
69Winnebago County6.2+0.3 pts
72Adair County6.1-0.1 pts
72Hancock County6.1-0.1 pts
72Lucas County6.1-0.4 pts
75Kossuth County6+0.3 pts
75Plymouth County6-0.1 pts
77Des Moines County5.9-0.4 pts
77Ida County5.9+0.4 pts
77Lee County5.9-0.1 pts
77Palo Alto County5.9+0.4 pts
81Cerro Gordo County5.8+0.4 pts
81Dickinson County5.8+0.2 pts
81Mills County5.8+0.5 pts
84Fremont County5.7+0.1 pts
84Madison County5.7+0.1 pts
86Carroll County5.6+0.4 pts
87Benton County5.5-0.3 pts
87Dubuque County5.5+0.2 pts
89Boone County5.4+0.5 pts
90Cedar County5.2+0.2 pts
90Jasper County5.2+0.1 pts
90Linn County5.2+0.2 pts
93Iowa County5.1+0.1 pts
94Marion County5-0.1 pts
94Winneshiek County5-0.3 pts
96Dallas County4.6-0.2 pts
96Warren County4.60 pts
98Grundy County4.5+0.4 pts
99Bremer County4.4-0.2 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-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 Iowa 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 Iowa 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/iowa-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 Iowa 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/iowa-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 Iowa 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/iowa-counties?period=2018 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_iowa_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 Iowa 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/iowa-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 Iowa 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/iowa-counties?period=2018
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/iowa-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)?

Crawford County, with 13.7% in 2018, 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 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 Iowa: more rankings