Data / Rankings / Diagnosed diabetes in adults, local model estimate / Counties in Iowa

Counties in Iowa by diagnosed diabetes in adults, local model estimate

Appanoose County had the highest diagnosed diabetes in adults, local model estimate of 99 counties in 2021, at 13.4%. Story County had the lowest, at 7.2%. The median was 11%. Source: the Centers for Disease Control and Prevention.

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Highest13.4Appanoose County
Lowest7.2Story County
Median1199 counties

Map of counties, 2021

Adair County: 11.5 %Adams County: 11.6 %Allamakee County: 11.9 %Appanoose County: 13.4 %Audubon County: 11.9 %Benton County: 10.2 %Black Hawk County: 10.2 %Boone County: 9.7 %Bremer County: 8.9 %Buchanan County: 9.9 %Buena Vista County: 11.2 %Butler County: 11.4 %Calhoun County: 11.2 %Carroll County: 10.8 %Cass County: 12.1 %Cedar County: 10.3 %Cerro Gordo County: 11 %Cherokee County: 12.1 %Chickasaw County: 10.6 %Clarke County: 12.6 %Clay County: 10.7 %Clayton County: 12.3 %Clinton County: 11.7 %Crawford County: 12.6 %Dallas County: 7.4 %Davis County: 10.6 %Decatur County: 10.7 %Delaware County: 10.6 %Des Moines County: 11.5 %Dickinson County: 10.7 %Dubuque County: 9.6 %Emmet County: 11.5 %Fayette County: 11.9 %Floyd County: 11.3 %Franklin County: 12.2 %Fremont County: 11.7 %Greene County: 11.8 %Grundy County: 9.5 %Guthrie County: 10.9 %Hamilton County: 10.4 %Hancock County: 11 %Hardin County: 11.1 %Harrison County: 10.6 %Henry County: 10.5 %Howard County: 10.7 %Humboldt County: 11.7 %Ida County: 11.3 %Iowa County: 10.1 %Jackson County: 11.4 %Jasper County: 10.3 %Jefferson County: 11.4 %Johnson County: 7.4 %Jones County: 11.1 %Keokuk County: 11.7 %Kossuth County: 11.9 %Lee County: 12 %Linn County: 9.1 %Louisa County: 11.9 %Lucas County: 12.5 %Lyon County: 9.6 %Madison County: 9.1 %Mahaska County: 10.5 %Marion County: 9.7 %Marshall County: 11.3 %Mills County: 10.1 %Mitchell County: 10.8 %Monona County: 11.9 %Monroe County: 10.4 %Montgomery County: 12.3 %Muscatine County: 10.6 %O'Brien County: 11 %Osceola County: 11.3 %Page County: 11.9 %Palo Alto County: 10.6 %Plymouth County: 10 %Pocahontas County: 12.1 %Polk County: 8.7 %Pottawattamie County: 10.8 %Poweshiek County: 10 %Ringgold County: 11.9 %Sac County: 11.3 %Scott County: 10 %Shelby County: 10.9 %Sioux County: 7.9 %Story County: 7.2 %Tama County: 12.3 %Taylor County: 11.2 %Union County: 10.7 %Van Buren County: 12.8 %Wapello County: 11.8 %Warren County: 8.4 %Washington County: 10.3 %Wayne County: 12 %Webster County: 10.8 %Winnebago County: 10.4 %Winneshiek County: 9.5 %Woodbury County: 11.1 %Worth County: 10.6 %Wright County: 12.2 %
  • Under 10
  • 10 to 11
  • 11 to 12
  • 12 and over
%, 2021. Source: CDC, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), diagnosed diabetes in adults, crude prevalence. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2021

Appanoose County: 13.4 %Appanoose County13.4Van Buren County: 12.8 %Van Buren County12.8Clarke County: 12.6 %Clarke County12.6Crawford County: 12.6 %Crawford County12.6Lucas County: 12.5 %Lucas County12.5Clayton County: 12.3 %Clayton County12.3Montgomery County: 12.3 %Montgomery County12.3Tama County: 12.3 %Tama County12.3Franklin County: 12.2 %Franklin County12.2Wright County: 12.2 %Wright County12.2Cass County: 12.1 %Cass County12.1Cherokee County: 12.1 %Cherokee County12.1Pocahontas County: 12.1 %Pocahontas County12.1Lee County: 12 %Lee County12Wayne County: 12 %Wayne County12Allamakee County: 11.9 %Allamakee County11.9Audubon County: 11.9 %Audubon County11.9Fayette County: 11.9 %Fayette County11.9Kossuth County: 11.9 %Kossuth County11.9Louisa County: 11.9 %Louisa County11.9Monona County: 11.9 %Monona County11.9Page County: 11.9 %Page County11.9Ringgold County: 11.9 %Ringgold County11.9Greene County: 11.8 %Greene County11.8Wapello County: 11.8 %Wapello County11.8Clinton County: 11.7 %Clinton County11.7Fremont County: 11.7 %Fremont County11.7Humboldt County: 11.7 %Humboldt County11.7Keokuk County: 11.7 %Keokuk County11.7Adams County: 11.6 %Adams County11.6Adair County: 11.5 %Adair County11.5Des Moines County: 11.5 %Des Moines County11.5Emmet County: 11.5 %Emmet County11.5Butler County: 11.4 %Butler County11.4Jackson County: 11.4 %Jackson County11.4Jefferson County: 11.4 %Jefferson County11.4Floyd County: 11.3 %Floyd County11.3Ida County: 11.3 %Ida County11.3Marshall County: 11.3 %Marshall County11.3Osceola County: 11.3 %Osceola County11.3Appanoose County: 13.4 %Appanoose County13.4Van Buren County: 12.8 %Van Buren County12.8Clarke County: 12.6 %Clarke County12.6Crawford County: 12.6 %Crawford County12.6Lucas County: 12.5 %Lucas County12.5Clayton County: 12.3 %Clayton County12.3Montgomery County: 12.3 %Montgomery County12.3Tama County: 12.3 %Tama County12.3Franklin County: 12.2 %Franklin County12.2Wright County: 12.2 %Wright County12.2Cass County: 12.1 %Cass County12.1Cherokee County: 12.1 %Cherokee County12.1Pocahontas County: 12.1 %Pocahontas County12.1Lee County: 12 %Lee County12Wayne County: 12 %Wayne County12Allamakee County: 11.9 %Allamakee County11.9Audubon County: 11.9 %Audubon County11.9Fayette County: 11.9 %Fayette County11.9Kossuth County: 11.9 %Kossuth County11.9Louisa County: 11.9 %Louisa County11.9Monona County: 11.9 %Monona County11.9Page County: 11.9 %Page County11.9Ringgold County: 11.9 %Ringgold County11.9Greene County: 11.8 %Greene County11.8Wapello County: 11.8 %Wapello County11.8Clinton County: 11.7 %Clinton County11.7Fremont County: 11.7 %Fremont County11.7Humboldt County: 11.7 %Humboldt County11.7Keokuk County: 11.7 %Keokuk County11.7Adams County: 11.6 %Adams County11.6Adair County: 11.5 %Adair County11.5Des Moines County: 11.5 %Des Moines County11.5Emmet County: 11.5 %Emmet County11.5Butler County: 11.4 %Butler County11.4Jackson County: 11.4 %Jackson County11.4Jefferson County: 11.4 %Jefferson County11.4Floyd County: 11.3 %Floyd County11.3Ida County: 11.3 %Ida County11.3Marshall County: 11.3 %Marshall County11.3Osceola County: 11.3 %Osceola County11.3
%. Source: CDC, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), diagnosed diabetes in adults, crude prevalence. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Appanoose County13.4
2Van Buren County12.8
3Clarke County12.6
3Crawford County12.6
5Lucas County12.5
6Clayton County12.3
6Montgomery County12.3
6Tama County12.3
9Franklin County12.2
9Wright County12.2
11Cass County12.1
11Cherokee County12.1
11Pocahontas County12.1
14Lee County12
14Wayne County12
16Allamakee County11.9
16Audubon County11.9
16Fayette County11.9
16Kossuth County11.9
16Louisa County11.9
16Monona County11.9
16Page County11.9
16Ringgold County11.9
24Greene County11.8
24Wapello County11.8
26Clinton County11.7
26Fremont County11.7
26Humboldt County11.7
26Keokuk County11.7
30Adams County11.6
31Adair County11.5
31Des Moines County11.5
31Emmet County11.5
34Butler County11.4
34Jackson County11.4
34Jefferson County11.4
37Floyd County11.3
37Ida County11.3
37Marshall County11.3
37Osceola County11.3
37Sac County11.3
42Buena Vista County11.2
42Calhoun County11.2
42Taylor County11.2
45Hardin County11.1
45Jones County11.1
45Woodbury County11.1
48Cerro Gordo County11
48Hancock County11
48O'Brien County11
51Guthrie County10.9
51Shelby County10.9
53Carroll County10.8
53Mitchell County10.8
53Pottawattamie County10.8
53Webster County10.8
57Clay County10.7
57Decatur County10.7
57Dickinson County10.7
57Howard County10.7
57Union County10.7
62Chickasaw County10.6
62Davis County10.6
62Delaware County10.6
62Harrison County10.6
62Muscatine County10.6
62Palo Alto County10.6
62Worth County10.6
69Henry County10.5
69Mahaska County10.5
71Hamilton County10.4
71Monroe County10.4
71Winnebago County10.4
74Cedar County10.3
74Jasper County10.3
74Washington County10.3
77Benton County10.2
77Black Hawk County10.2
79Iowa County10.1
79Mills County10.1
81Plymouth County10
81Poweshiek County10
81Scott County10
84Buchanan County9.9
85Boone County9.7
85Marion County9.7
87Dubuque County9.6
87Lyon County9.6
89Grundy County9.5
89Winneshiek County9.5
91Linn County9.1
91Madison County9.1
93Bremer County8.9
94Polk County8.7
95Warren County8.4
96Sioux County7.9
97Dallas County7.4
97Johnson County7.4
99Story County7.2

Other periods

About this ranking

Percentage of adults who report being told by a doctor or other health professional that they have diabetes, other than diabetes only during pregnancy. Model-based estimate for adults aged 18 and over from CDC PLACES. Crude prevalence, not age-adjusted.

US counties and cities (incorporated places of 10,000 or more). CDC PLACES combines Behavioral Risk Factor Surveillance System (BRFSS) answers with local population data through multilevel regression and poststratification, so a county or city value is a model estimate, not a survey count. The year is the BRFSS survey year, not the release year. CDC says the method does not support tracking change in a place over time, and each annual release can change the model, so values for different years are not strictly comparable. A state is missing in a year when its BRFSS data did not meet standards (Kentucky and Pennsylvania in 2023, Florida in 2021). Connecticut counties appear as its nine planning regions from 2022; its eight former counties are not served. City values for 2021 come from the 2023 release, built on 2010 Census place boundaries; later years use 2020 boundaries.

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

Centers for Disease Control and Prevention (CDC). PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), diagnosed diabetes in adults, crude prevalence. https://www.cdc.gov/places/. Retrieved 2026-10-12. These data are available free from CDC. Use does not imply endorsement by CDC, ATSDR, HHS or the United States Government.

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

Centers for Disease Control and Prevention. (2025). PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), diagnosed diabetes in adults, crude prevalence (Counties in Iowa by diagnosed diabetes in adults, local model estimate, 2021) [Data set]. Retrieved October 12, 2026, from https://www.cdc.gov/places/

MLA 9

PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), diagnosed diabetes in adults, crude prevalence, Counties in Iowa by diagnosed diabetes in adults, local model estimate, 2021. Centers for Disease Control and Prevention, 4 Dec. 2025, https://www.cdc.gov/places/. Invokely, https://invokely.ai/rankings/adult-diabetes-rate-county-estimate/iowa-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

Centers for Disease Control and Prevention. 2025. PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), diagnosed diabetes in adults, crude prevalence. Counties in Iowa by diagnosed diabetes in adults, local model estimate, 2021. Dataset. Accessed October 12, 2026. https://www.cdc.gov/places/. Also distributed by Invokely, https://invokely.ai/rankings/adult-diabetes-rate-county-estimate/iowa-counties?period=2021.

Harvard

Centers for Disease Control and Prevention (2025) PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), diagnosed diabetes in adults, crude prevalence, Counties in Iowa by diagnosed diabetes in adults, local model estimate, 2021 [Dataset]. Available at: https://www.cdc.gov/places/, via Invokely: https://invokely.ai/rankings/adult-diabetes-rate-county-estimate/iowa-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{centers_counties_in_iowa_by_2021,
  author = {{Centers for Disease Control and Prevention}},
  title = {{PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), diagnosed diabetes in adults, crude prevalence: Counties in Iowa by diagnosed diabetes in adults, local model estimate, 2021}},
  year = {2025},
  howpublished = {Data set},
  url = {https://www.cdc.gov/places/},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/adult-diabetes-rate-county-estimate/iowa-counties?period=2021. Publisher attribution: Centers for Disease Control and Prevention (CDC). PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), diagnosed diabetes in adults, crude prevalence. https://www.cdc.gov/places/. Retrieved 2026-10-12. These data are available free from CDC. Use does not imply endorsement by CDC, ATSDR, HHS or the United States Government.},
}
RIS
TY  - DATA
AU  - Centers for Disease Control and Prevention
TI  - PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), diagnosed diabetes in adults, crude prevalence: Counties in Iowa by diagnosed diabetes in adults, local model estimate, 2021
PY  - 2025
DA  - 2025/12/04
PB  - Centers for Disease Control and Prevention
DB  - Invokely
UR  - https://www.cdc.gov/places/
L2  - https://invokely.ai/rankings/adult-diabetes-rate-county-estimate/iowa-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/adult-diabetes-rate-county-estimate/iowa-counties?period=2021.
N1  - Publisher attribution: Centers for Disease Control and Prevention (CDC). PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), diagnosed diabetes in adults, crude prevalence. https://www.cdc.gov/places/. Retrieved 2026-10-12. These data are available free from CDC. Use does not imply endorsement by CDC, ATSDR, HHS or the United States Government.
ER  -
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Rank Counties in Iowa by diagnosed diabetes in adults, local model estimate using official data, and cite the source.
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Questions

Which county has the highest diagnosed diabetes in adults, local model estimate?

Appanoose County, with 13.4% in 2021, according to the Centers for Disease Control and Prevention.

Which county has the lowest diagnosed diabetes in adults, local model estimate?

Story County, with 7.2% in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: Centers for Disease Control and Prevention, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), diagnosed diabetes in adults, crude prevalence. Retrieved 2026-10-12.

Diagnosed diabetes in adults, local model estimate: other rankings

Counties in Iowa: more rankings