Data / Rankings / Adult obesity rate, local model estimate / Counties in Iowa

Counties in Iowa by adult obesity rate, local model estimate

Clarke County had the highest adult obesity rate, local model estimate of 99 counties in 2021, at 42.9%. Story County had the lowest, at 28.7%. The median was 37.6%. Source: the Centers for Disease Control and Prevention.

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Highest42.9Clarke County
Lowest28.7Story County
Median37.699 counties

Map of counties, 2021

Adair County: 37.5 %Adams County: 37.4 %Allamakee County: 35.9 %Appanoose County: 38.9 %Audubon County: 37.5 %Benton County: 38.6 %Black Hawk County: 35.4 %Boone County: 35.8 %Bremer County: 34.3 %Buchanan County: 35.5 %Buena Vista County: 34.2 %Butler County: 39.6 %Calhoun County: 39.8 %Carroll County: 38.6 %Cass County: 42.3 %Cedar County: 39.9 %Cerro Gordo County: 35.3 %Cherokee County: 42.1 %Chickasaw County: 39.1 %Clarke County: 42.9 %Clay County: 37.1 %Clayton County: 40 %Clinton County: 41.3 %Crawford County: 38.3 %Dallas County: 35.5 %Davis County: 36.7 %Decatur County: 36 %Delaware County: 36.3 %Des Moines County: 38.4 %Dickinson County: 36.9 %Dubuque County: 32.3 %Emmet County: 39 %Fayette County: 40.6 %Floyd County: 38.2 %Franklin County: 38.8 %Fremont County: 38.8 %Greene County: 36.1 %Grundy County: 37.3 %Guthrie County: 36.2 %Hamilton County: 39.1 %Hancock County: 36.1 %Hardin County: 36.5 %Harrison County: 38.8 %Henry County: 38.9 %Howard County: 35.1 %Humboldt County: 37.6 %Ida County: 35.8 %Iowa County: 37.4 %Jackson County: 37.2 %Jasper County: 36.3 %Jefferson County: 34.6 %Johnson County: 31.1 %Jones County: 42.8 %Keokuk County: 39.2 %Kossuth County: 38.6 %Lee County: 41.2 %Linn County: 38.4 %Louisa County: 40.7 %Lucas County: 37.8 %Lyon County: 36.8 %Madison County: 38.8 %Mahaska County: 39 %Marion County: 36.3 %Marshall County: 37 %Mills County: 37.9 %Mitchell County: 37.4 %Monona County: 40.4 %Monroe County: 37.7 %Montgomery County: 37.5 %Muscatine County: 38.6 %O'Brien County: 36.2 %Osceola County: 39.4 %Page County: 42.5 %Palo Alto County: 38 %Plymouth County: 36.4 %Pocahontas County: 39.1 %Polk County: 35.9 %Pottawattamie County: 38.4 %Poweshiek County: 36 %Ringgold County: 38.1 %Sac County: 38.5 %Scott County: 37.4 %Shelby County: 36.2 %Sioux County: 36.8 %Story County: 28.7 %Tama County: 42.6 %Taylor County: 37.3 %Union County: 37.2 %Van Buren County: 39.9 %Wapello County: 40.3 %Warren County: 37.7 %Washington County: 36.6 %Wayne County: 40.9 %Webster County: 33.5 %Winnebago County: 37.3 %Winneshiek County: 32.8 %Woodbury County: 38.2 %Worth County: 37.4 %Wright County: 39.1 %
  • Under 36
  • 36 to 37
  • 37 to 38
  • 38 to 39
  • 39 to 40
  • 40 and over
%, 2021. Source: CDC, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), adult obesity rate, crude prevalence. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2021

Clarke County: 42.9 %Clarke County42.9Jones County: 42.8 %Jones County42.8Tama County: 42.6 %Tama County42.6Page County: 42.5 %Page County42.5Cass County: 42.3 %Cass County42.3Cherokee County: 42.1 %Cherokee County42.1Clinton County: 41.3 %Clinton County41.3Lee County: 41.2 %Lee County41.2Wayne County: 40.9 %Wayne County40.9Louisa County: 40.7 %Louisa County40.7Fayette County: 40.6 %Fayette County40.6Monona County: 40.4 %Monona County40.4Wapello County: 40.3 %Wapello County40.3Clayton County: 40 %Clayton County40Cedar County: 39.9 %Cedar County39.9Van Buren County: 39.9 %Van Buren County39.9Calhoun County: 39.8 %Calhoun County39.8Butler County: 39.6 %Butler County39.6Osceola County: 39.4 %Osceola County39.4Keokuk County: 39.2 %Keokuk County39.2Chickasaw County: 39.1 %Chickasaw County39.1Hamilton County: 39.1 %Hamilton County39.1Pocahontas County: 39.1 %Pocahontas County39.1Wright County: 39.1 %Wright County39.1Emmet County: 39 %Emmet County39Mahaska County: 39 %Mahaska County39Appanoose County: 38.9 %Appanoose County38.9Henry County: 38.9 %Henry County38.9Franklin County: 38.8 %Franklin County38.8Fremont County: 38.8 %Fremont County38.8Harrison County: 38.8 %Harrison County38.8Madison County: 38.8 %Madison County38.8Benton County: 38.6 %Benton County38.6Carroll County: 38.6 %Carroll County38.6Kossuth County: 38.6 %Kossuth County38.6Muscatine County: 38.6 %Muscatine County38.6Sac County: 38.5 %Sac County38.5Des Moines County: 38.4 %Des Moines County38.4Linn County: 38.4 %Linn County38.4Pottawattamie County: 38.4 %Pottawattamie County38.4Clarke County: 42.9 %Clarke County42.9Jones County: 42.8 %Jones County42.8Tama County: 42.6 %Tama County42.6Page County: 42.5 %Page County42.5Cass County: 42.3 %Cass County42.3Cherokee County: 42.1 %Cherokee County42.1Clinton County: 41.3 %Clinton County41.3Lee County: 41.2 %Lee County41.2Wayne County: 40.9 %Wayne County40.9Louisa County: 40.7 %Louisa County40.7Fayette County: 40.6 %Fayette County40.6Monona County: 40.4 %Monona County40.4Wapello County: 40.3 %Wapello County40.3Clayton County: 40 %Clayton County40Cedar County: 39.9 %Cedar County39.9Van Buren County: 39.9 %Van Buren County39.9Calhoun County: 39.8 %Calhoun County39.8Butler County: 39.6 %Butler County39.6Osceola County: 39.4 %Osceola County39.4Keokuk County: 39.2 %Keokuk County39.2Chickasaw County: 39.1 %Chickasaw County39.1Hamilton County: 39.1 %Hamilton County39.1Pocahontas County: 39.1 %Pocahontas County39.1Wright County: 39.1 %Wright County39.1Emmet County: 39 %Emmet County39Mahaska County: 39 %Mahaska County39Appanoose County: 38.9 %Appanoose County38.9Henry County: 38.9 %Henry County38.9Franklin County: 38.8 %Franklin County38.8Fremont County: 38.8 %Fremont County38.8Harrison County: 38.8 %Harrison County38.8Madison County: 38.8 %Madison County38.8Benton County: 38.6 %Benton County38.6Carroll County: 38.6 %Carroll County38.6Kossuth County: 38.6 %Kossuth County38.6Muscatine County: 38.6 %Muscatine County38.6Sac County: 38.5 %Sac County38.5Des Moines County: 38.4 %Des Moines County38.4Linn County: 38.4 %Linn County38.4Pottawattamie County: 38.4 %Pottawattamie County38.4
%. Source: CDC, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), adult obesity rate, crude prevalence. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Clarke County42.9
2Jones County42.8
3Tama County42.6
4Page County42.5
5Cass County42.3
6Cherokee County42.1
7Clinton County41.3
8Lee County41.2
9Wayne County40.9
10Louisa County40.7
11Fayette County40.6
12Monona County40.4
13Wapello County40.3
14Clayton County40
15Cedar County39.9
15Van Buren County39.9
17Calhoun County39.8
18Butler County39.6
19Osceola County39.4
20Keokuk County39.2
21Chickasaw County39.1
21Hamilton County39.1
21Pocahontas County39.1
21Wright County39.1
25Emmet County39
25Mahaska County39
27Appanoose County38.9
27Henry County38.9
29Franklin County38.8
29Fremont County38.8
29Harrison County38.8
29Madison County38.8
33Benton County38.6
33Carroll County38.6
33Kossuth County38.6
33Muscatine County38.6
37Sac County38.5
38Des Moines County38.4
38Linn County38.4
38Pottawattamie County38.4
41Crawford County38.3
42Floyd County38.2
42Woodbury County38.2
44Ringgold County38.1
45Palo Alto County38
46Mills County37.9
47Lucas County37.8
48Monroe County37.7
48Warren County37.7
50Humboldt County37.6
51Adair County37.5
51Audubon County37.5
51Montgomery County37.5
54Adams County37.4
54Iowa County37.4
54Mitchell County37.4
54Scott County37.4
54Worth County37.4
59Grundy County37.3
59Taylor County37.3
59Winnebago County37.3
62Jackson County37.2
62Union County37.2
64Clay County37.1
65Marshall County37
66Dickinson County36.9
67Lyon County36.8
67Sioux County36.8
69Davis County36.7
70Washington County36.6
71Hardin County36.5
72Plymouth County36.4
73Delaware County36.3
73Jasper County36.3
73Marion County36.3
76Guthrie County36.2
76O'Brien County36.2
76Shelby County36.2
79Greene County36.1
79Hancock County36.1
81Decatur County36
81Poweshiek County36
83Allamakee County35.9
83Polk County35.9
85Boone County35.8
85Ida County35.8
87Buchanan County35.5
87Dallas County35.5
89Black Hawk County35.4
90Cerro Gordo County35.3
91Howard County35.1
92Jefferson County34.6
93Bremer County34.3
94Buena Vista County34.2
95Webster County33.5
96Winneshiek County32.8
97Dubuque County32.3
98Johnson County31.1
99Story County28.7

Other periods

About this ranking

Percentage of adults with a body mass index of 30 or more, calculated from self-reported weight and height. 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. State and national values come from direct BRFSS estimates under adult_obesity_rate.

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), adult obesity rate, 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), adult obesity rate, crude prevalence (Counties in Iowa by adult obesity rate, 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), adult obesity rate, crude prevalence, Counties in Iowa by adult obesity rate, local model estimate, 2021. Centers for Disease Control and Prevention, 4 Dec. 2025, https://www.cdc.gov/places/. Invokely, https://invokely.ai/rankings/adult-obesity-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), adult obesity rate, crude prevalence. Counties in Iowa by adult obesity rate, local model estimate, 2021. Dataset. Accessed October 12, 2026. https://www.cdc.gov/places/. Also distributed by Invokely, https://invokely.ai/rankings/adult-obesity-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), adult obesity rate, crude prevalence, Counties in Iowa by adult obesity rate, local model estimate, 2021 [Dataset]. Available at: https://www.cdc.gov/places/, via Invokely: https://invokely.ai/rankings/adult-obesity-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), adult obesity rate, crude prevalence: Counties in Iowa by adult obesity rate, 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-obesity-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), adult obesity rate, 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), adult obesity rate, crude prevalence: Counties in Iowa by adult obesity rate, 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-obesity-rate-county-estimate/iowa-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/adult-obesity-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), adult obesity rate, 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 adult obesity rate, local model estimate using official data, and cite the source.
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Questions

Which county has the highest adult obesity rate, local model estimate?

Clarke County, with 42.9% in 2021, according to the Centers for Disease Control and Prevention.

Which county has the lowest adult obesity rate, local model estimate?

Story County, with 28.7% 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), adult obesity rate, crude prevalence. Retrieved 2026-10-12.

Adult obesity rate, local model estimate: other rankings

Counties in Iowa: more rankings