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

Counties in Iowa by adult obesity rate, local model estimate, 2023

Marshall County had the highest adult obesity rate, local model estimate of 99 counties in 2023, at 44.1%. Johnson County had the lowest, at 30.4%. The median was 39.5%. Source: the Centers for Disease Control and Prevention.

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Highest44.1Marshall County
Lowest30.4Johnson County
Median39.599 counties

Map of counties, 2023

Adair County: 39.9 %Adams County: 39.1 %Allamakee County: 42.3 %Appanoose County: 43.4 %Audubon County: 37.6 %Benton County: 40.8 %Black Hawk County: 40.4 %Boone County: 43.4 %Bremer County: 37.6 %Buchanan County: 37.6 %Buena Vista County: 38.1 %Butler County: 39.3 %Calhoun County: 39.8 %Carroll County: 39.7 %Cass County: 40.7 %Cedar County: 40.8 %Cerro Gordo County: 40.1 %Cherokee County: 40.6 %Chickasaw County: 39.4 %Clarke County: 43.1 %Clay County: 35.2 %Clayton County: 41 %Clinton County: 39.3 %Crawford County: 42.6 %Dallas County: 32.8 %Davis County: 37.5 %Decatur County: 39.6 %Delaware County: 39.7 %Des Moines County: 34.6 %Dickinson County: 37.2 %Dubuque County: 34.3 %Emmet County: 42.5 %Fayette County: 38.5 %Floyd County: 39.8 %Franklin County: 40.7 %Fremont County: 39.9 %Greene County: 35.8 %Grundy County: 37.5 %Guthrie County: 37.2 %Hamilton County: 36.5 %Hancock County: 42.2 %Hardin County: 38.9 %Harrison County: 35.2 %Henry County: 38.8 %Howard County: 38 %Humboldt County: 41.4 %Ida County: 41 %Iowa County: 43.4 %Jackson County: 40.3 %Jasper County: 38.3 %Jefferson County: 39.6 %Johnson County: 30.4 %Jones County: 39.7 %Keokuk County: 41.4 %Kossuth County: 38.2 %Lee County: 37.6 %Linn County: 35.4 %Louisa County: 40.2 %Lucas County: 39.8 %Lyon County: 42.2 %Madison County: 37.2 %Mahaska County: 38.6 %Marion County: 39.4 %Marshall County: 44.1 %Mills County: 39.2 %Mitchell County: 40.1 %Monona County: 42.2 %Monroe County: 38.2 %Montgomery County: 39.5 %Muscatine County: 41.4 %O'Brien County: 38.8 %Osceola County: 39.5 %Page County: 42.9 %Palo Alto County: 40 %Plymouth County: 39.4 %Pocahontas County: 36.2 %Polk County: 37 %Pottawattamie County: 39.1 %Poweshiek County: 40.5 %Ringgold County: 42.7 %Sac County: 41.3 %Scott County: 40.6 %Shelby County: 37.8 %Sioux County: 33 %Story County: 30.8 %Tama County: 40.2 %Taylor County: 39.7 %Union County: 37.2 %Van Buren County: 39.5 %Wapello County: 41.7 %Warren County: 38.7 %Washington County: 38.6 %Wayne County: 40.6 %Webster County: 41.2 %Winnebago County: 38.4 %Winneshiek County: 34.7 %Woodbury County: 39.1 %Worth County: 40.5 %Wright County: 40.7 %
  • Under 37
  • 37 to 39
  • 39 to 40
  • 40 to 41
  • 41 and over
%, 2023. 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, 2023

Marshall County: 44.1 %Marshall County44.1Appanoose County: 43.4 %Appanoose County43.4Boone County: 43.4 %Boone County43.4Iowa County: 43.4 %Iowa County43.4Clarke County: 43.1 %Clarke County43.1Page County: 42.9 %Page County42.9Ringgold County: 42.7 %Ringgold County42.7Crawford County: 42.6 %Crawford County42.6Emmet County: 42.5 %Emmet County42.5Allamakee County: 42.3 %Allamakee County42.3Hancock County: 42.2 %Hancock County42.2Lyon County: 42.2 %Lyon County42.2Monona County: 42.2 %Monona County42.2Wapello County: 41.7 %Wapello County41.7Humboldt County: 41.4 %Humboldt County41.4Keokuk County: 41.4 %Keokuk County41.4Muscatine County: 41.4 %Muscatine County41.4Sac County: 41.3 %Sac County41.3Webster County: 41.2 %Webster County41.2Clayton County: 41 %Clayton County41Ida County: 41 %Ida County41Benton County: 40.8 %Benton County40.8Cedar County: 40.8 %Cedar County40.8Cass County: 40.7 %Cass County40.7Franklin County: 40.7 %Franklin County40.7Wright County: 40.7 %Wright County40.7Cherokee County: 40.6 %Cherokee County40.6Scott County: 40.6 %Scott County40.6Wayne County: 40.6 %Wayne County40.6Poweshiek County: 40.5 %Poweshiek County40.5Worth County: 40.5 %Worth County40.5Black Hawk County: 40.4 %Black Hawk County40.4Jackson County: 40.3 %Jackson County40.3Louisa County: 40.2 %Louisa County40.2Tama County: 40.2 %Tama County40.2Cerro Gordo County: 40.1 %Cerro Gordo County40.1Mitchell County: 40.1 %Mitchell County40.1Palo Alto County: 40 %Palo Alto County40Adair County: 39.9 %Adair County39.9Fremont County: 39.9 %Fremont County39.9Marshall County: 44.1 %Marshall County44.1Appanoose County: 43.4 %Appanoose County43.4Boone County: 43.4 %Boone County43.4Iowa County: 43.4 %Iowa County43.4Clarke County: 43.1 %Clarke County43.1Page County: 42.9 %Page County42.9Ringgold County: 42.7 %Ringgold County42.7Crawford County: 42.6 %Crawford County42.6Emmet County: 42.5 %Emmet County42.5Allamakee County: 42.3 %Allamakee County42.3Hancock County: 42.2 %Hancock County42.2Lyon County: 42.2 %Lyon County42.2Monona County: 42.2 %Monona County42.2Wapello County: 41.7 %Wapello County41.7Humboldt County: 41.4 %Humboldt County41.4Keokuk County: 41.4 %Keokuk County41.4Muscatine County: 41.4 %Muscatine County41.4Sac County: 41.3 %Sac County41.3Webster County: 41.2 %Webster County41.2Clayton County: 41 %Clayton County41Ida County: 41 %Ida County41Benton County: 40.8 %Benton County40.8Cedar County: 40.8 %Cedar County40.8Cass County: 40.7 %Cass County40.7Franklin County: 40.7 %Franklin County40.7Wright County: 40.7 %Wright County40.7Cherokee County: 40.6 %Cherokee County40.6Scott County: 40.6 %Scott County40.6Wayne County: 40.6 %Wayne County40.6Poweshiek County: 40.5 %Poweshiek County40.5Worth County: 40.5 %Worth County40.5Black Hawk County: 40.4 %Black Hawk County40.4Jackson County: 40.3 %Jackson County40.3Louisa County: 40.2 %Louisa County40.2Tama County: 40.2 %Tama County40.2Cerro Gordo County: 40.1 %Cerro Gordo County40.1Mitchell County: 40.1 %Mitchell County40.1Palo Alto County: 40 %Palo Alto County40Adair County: 39.9 %Adair County39.9Fremont County: 39.9 %Fremont County39.9
%. 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

RankCounties2023 (%)Change on 2022
1Marshall County44.1+3.9 pts
2Appanoose County43.4+0.2 pts
2Boone County43.4+4.8 pts
2Iowa County43.4+7.4 pts
5Clarke County43.1+1.4 pts
6Page County42.9-0.7 pts
7Ringgold County42.7+1.7 pts
8Crawford County42.6-1.3 pts
9Emmet County42.5+4.5 pts
10Allamakee County42.3+4.3 pts
11Hancock County42.2+6.5 pts
11Lyon County42.2+4.2 pts
11Monona County42.2+2 pts
14Wapello County41.7+0.1 pts
15Humboldt County41.4-1.8 pts
15Keokuk County41.4+1.4 pts
15Muscatine County41.4+3.8 pts
18Sac County41.3+0.9 pts
19Webster County41.2+3.4 pts
20Clayton County41+0.4 pts
20Ida County41+3.9 pts
22Benton County40.8-1.3 pts
22Cedar County40.8+2.7 pts
24Cass County40.7-3.8 pts
24Franklin County40.7+0.4 pts
24Wright County40.7-0.7 pts
27Cherokee County40.6+0.5 pts
27Scott County40.6+1.5 pts
27Wayne County40.6+1.9 pts
30Poweshiek County40.5-0.1 pts
30Worth County40.5+0.5 pts
32Black Hawk County40.4+2.9 pts
33Jackson County40.3-1.6 pts
34Louisa County40.2-4.8 pts
34Tama County40.2-0.8 pts
36Cerro Gordo County40.1+2 pts
36Mitchell County40.1-4 pts
38Palo Alto County40-0.8 pts
39Adair County39.9-1.7 pts
39Fremont County39.9+4 pts
41Calhoun County39.8+1.3 pts
41Floyd County39.8-2.8 pts
41Lucas County39.8-1.8 pts
44Carroll County39.7-1.7 pts
44Delaware County39.7-0.4 pts
44Jones County39.7+0.5 pts
44Taylor County39.7-0.3 pts
48Decatur County39.6+4 pts
48Jefferson County39.6+2.5 pts
50Montgomery County39.5-0.1 pts
50Osceola County39.5+0.2 pts
50Van Buren County39.5-1.4 pts
53Chickasaw County39.4+2 pts
53Marion County39.4+1.6 pts
53Plymouth County39.4+2.4 pts
56Butler County39.3-0.6 pts
56Clinton County39.3-1.2 pts
58Mills County39.2-1.7 pts
59Adams County39.1+0.8 pts
59Pottawattamie County39.1-3.4 pts
59Woodbury County39.1+1.1 pts
62Hardin County38.9+0.4 pts
63Henry County38.8-1.2 pts
63O'Brien County38.8+0.5 pts
65Warren County38.7-3.5 pts
66Mahaska County38.6-3.6 pts
66Washington County38.6-1.8 pts
68Fayette County38.5-0.4 pts
69Winnebago County38.4+0.1 pts
70Jasper County38.3-0.7 pts
71Kossuth County38.2+1.8 pts
71Monroe County38.2+1 pts
73Buena Vista County38.1-2.2 pts
74Howard County38+0.4 pts
75Shelby County37.8+2.9 pts
76Audubon County37.6-3.5 pts
76Bremer County37.6-0.8 pts
76Buchanan County37.6-3.4 pts
76Lee County37.6-3.4 pts
80Davis County37.5-2.6 pts
80Grundy County37.5-1.1 pts
82Dickinson County37.2+0.7 pts
82Guthrie County37.2-1.9 pts
82Madison County37.2-1.6 pts
82Union County37.20 pts
86Polk County37-2 pts
87Hamilton County36.5+1.1 pts
88Pocahontas County36.2-0.7 pts
89Greene County35.8-5.2 pts
90Linn County35.4-1.4 pts
91Clay County35.2-4.8 pts
91Harrison County35.2-4.9 pts
93Winneshiek County34.7-0.1 pts
94Des Moines County34.6-1.9 pts
95Dubuque County34.3-6.3 pts
96Sioux County33+0.4 pts
97Dallas County32.8+0.1 pts
98Story County30.80 pts
99Johnson County30.4+2 pts

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, 2023) [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, 2023. 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. 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, 2023. 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.

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, 2023 [Dataset]. Available at: https://www.cdc.gov/places/, via Invokely: https://invokely.ai/rankings/adult-obesity-rate-county-estimate/iowa-counties (Accessed: 12 October 2026).

BibTeX
@misc{centers_counties_in_iowa_by_2023,
  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, 2023}},
  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. 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, 2023
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
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/adult-obesity-rate-county-estimate/iowa-counties.
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?

Marshall County, with 44.1% in 2023, according to the Centers for Disease Control and Prevention.

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

Johnson County, with 30.4% in 2023.

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