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

Counties in California by adult obesity rate, local model estimate

San Bernardino County had the highest adult obesity rate, local model estimate of 58 counties in 2021, at 38.1%. Santa Clara County had the lowest, at 18.7%. The median was 30%. Source: the Centers for Disease Control and Prevention.

Highest38.1San Bernardino County
Lowest18.7Santa Clara County
Median3058 counties

All counties, 2021

San Bernardino County: 38.1 %San Bernardino County38.1Imperial County: 37.5 %Imperial County37.5Fresno County: 36.6 %Fresno County36.6Kern County: 36.4 %Kern County36.4Riverside County: 36 %Riverside County36Madera County: 35.7 %Madera County35.7Tulare County: 35.2 %Tulare County35.2Kings County: 34.8 %Kings County34.8Stanislaus County: 34.7 %Stanislaus County34.7Tehama County: 34 %Tehama County34Yuba County: 33.9 %Yuba County33.9Lake County: 33.7 %Lake County33.7San Joaquin County: 33.3 %San Joaquin County33.3Trinity County: 33.2 %Trinity County33.2Colusa County: 33.1 %Colusa County33.1Del Norte County: 32.8 %Del Norte County32.8Modoc County: 32.7 %Modoc County32.7Siskiyou County: 32.6 %Siskiyou County32.6Humboldt County: 32.5 %Humboldt County32.5Merced County: 32.5 %Merced County32.5Lassen County: 32 %Lassen County32Sacramento County: 31.9 %Sacramento County31.9Glenn County: 31.5 %Glenn County31.5Mendocino County: 31.4 %Mendocino County31.4Sutter County: 31.4 %Sutter County31.4San Benito County: 31.1 %San Benito County31.1Shasta County: 30.9 %Shasta County30.9Calaveras County: 30.6 %Calaveras County30.6Sierra County: 30 %Sierra County30Solano County: 29.9 %Solano County29.9Mono County: 29.8 %Mono County29.8Amador County: 29.7 %Amador County29.7Butte County: 29.7 %Butte County29.7Mariposa County: 29.7 %Mariposa County29.7Plumas County: 29.4 %Plumas County29.4Inyo County: 29.3 %Inyo County29.3Tuolumne County: 29.2 %Tuolumne County29.2Alpine County: 29.1 %Alpine County29.1San Luis Obispo County: 29 %San Luis Obispo County29Santa Barbara County: 28.6 %Santa Barbara County28.6Sonoma County: 28.6 %Sonoma County28.6Los Angeles County: 28.5 %Los Angeles County28.5El Dorado County: 28.4 %El Dorado County28.4Napa County: 27.8 %Napa County27.8Nevada County: 27.6 %Nevada County27.6Monterey County: 27.3 %Monterey County27.3Ventura County: 26.9 %Ventura County26.9Placer County: 26.5 %Placer County26.5Yolo County: 25.8 %Yolo County25.8Orange County: 25.4 %Orange County25.4Alameda County: 25.1 %Alameda County25.1Contra Costa County: 24.6 %Contra Costa County24.6Santa Cruz County: 24.3 %Santa Cruz County24.3San Diego County: 23.7 %San Diego County23.7Marin County: 23.1 %Marin County23.1San Mateo County: 21.3 %San Mateo County21.3San Francisco County: 18.8 %San Francisco County18.8Santa Clara County: 18.7 %Santa Clara County18.7
%. 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 (%)
1San Bernardino County38.1
2Imperial County37.5
3Fresno County36.6
4Kern County36.4
5Riverside County36
6Madera County35.7
7Tulare County35.2
8Kings County34.8
9Stanislaus County34.7
10Tehama County34
11Yuba County33.9
12Lake County33.7
13San Joaquin County33.3
14Trinity County33.2
15Colusa County33.1
16Del Norte County32.8
17Modoc County32.7
18Siskiyou County32.6
19Humboldt County32.5
19Merced County32.5
21Lassen County32
22Sacramento County31.9
23Glenn County31.5
24Mendocino County31.4
24Sutter County31.4
26San Benito County31.1
27Shasta County30.9
28Calaveras County30.6
29Sierra County30
30Solano County29.9
31Mono County29.8
32Amador County29.7
32Butte County29.7
32Mariposa County29.7
35Plumas County29.4
36Inyo County29.3
37Tuolumne County29.2
38Alpine County29.1
39San Luis Obispo County29
40Santa Barbara County28.6
40Sonoma County28.6
42Los Angeles County28.5
43El Dorado County28.4
44Napa County27.8
45Nevada County27.6
46Monterey County27.3
47Ventura County26.9
48Placer County26.5
49Yolo County25.8
50Orange County25.4
51Alameda County25.1
52Contra Costa County24.6
53Santa Cruz County24.3
54San Diego County23.7
55Marin County23.1
56San Mateo County21.3
57San Francisco County18.8
58Santa Clara County18.7

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 California 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 California 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/california-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 California 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/california-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 California 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/california-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{centers_counties_in_california_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 California 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/california-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 California 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/california-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/adult-obesity-rate-county-estimate/california-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 California 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?

San Bernardino County, with 38.1% in 2021, according to the Centers for Disease Control and Prevention.

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

Santa Clara County, with 18.7% 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 California: more rankings