Data / Rankings / High blood pressure in adults, local model estimate / Counties in California

Counties in California by high blood pressure in adults, local model estimate

Trinity County had the highest high blood pressure in adults, local model estimate of 58 counties in 2021, at 40.3%. Santa Clara County had the lowest, at 24.8%. The median was 30.4%. Source: the Centers for Disease Control and Prevention.

Highest40.3Trinity County
Lowest24.8Santa Clara County
Median30.458 counties

All counties, 2021

Trinity County: 40.3 %Trinity County40.3Modoc County: 39 %Modoc County39Sierra County: 38.2 %Sierra County38.2Mariposa County: 38.1 %Mariposa County38.1Calaveras County: 37.5 %Calaveras County37.5Siskiyou County: 37 %Siskiyou County37Plumas County: 36.8 %Plumas County36.8Nevada County: 35.5 %Nevada County35.5Lake County: 35.1 %Lake County35.1Del Norte County: 34.8 %Del Norte County34.8Tuolumne County: 34.8 %Tuolumne County34.8Amador County: 34.7 %Amador County34.7Tehama County: 34.7 %Tehama County34.7Mendocino County: 34.3 %Mendocino County34.3Alpine County: 33.2 %Alpine County33.2Inyo County: 33.2 %Inyo County33.2Glenn County: 32.6 %Glenn County32.6Shasta County: 32.1 %Shasta County32.1Humboldt County: 32 %Humboldt County32Sutter County: 31.4 %Sutter County31.4El Dorado County: 31.3 %El Dorado County31.3Fresno County: 31 %Fresno County31Ventura County: 30.9 %Ventura County30.9Colusa County: 30.8 %Colusa County30.8Lassen County: 30.8 %Lassen County30.8Butte County: 30.7 %Butte County30.7Napa County: 30.7 %Napa County30.7Stanislaus County: 30.6 %Stanislaus County30.6Tulare County: 30.4 %Tulare County30.4Imperial County: 30.3 %Imperial County30.3Solano County: 30.3 %Solano County30.3Kern County: 30.1 %Kern County30.1Madera County: 30.1 %Madera County30.1Merced County: 30.1 %Merced County30.1Placer County: 29.9 %Placer County29.9San Luis Obispo County: 29.9 %San Luis Obispo County29.9San Bernardino County: 29.8 %San Bernardino County29.8Sacramento County: 29.7 %Sacramento County29.7Sonoma County: 29.7 %Sonoma County29.7Yuba County: 29.6 %Yuba County29.6Santa Cruz County: 29.4 %Santa Cruz County29.4San Joaquin County: 29.1 %San Joaquin County29.1Mono County: 29 %Mono County29Monterey County: 29 %Monterey County29Kings County: 28.8 %Kings County28.8Riverside County: 28.6 %Riverside County28.6Los Angeles County: 28.2 %Los Angeles County28.2Marin County: 28.1 %Marin County28.1Contra Costa County: 27.9 %Contra Costa County27.9Orange County: 27.9 %Orange County27.9San Mateo County: 27.4 %San Mateo County27.4Alameda County: 27.2 %Alameda County27.2Santa Barbara County: 27 %Santa Barbara County27San Benito County: 26.7 %San Benito County26.7Yolo County: 26 %Yolo County26San Diego County: 25.5 %San Diego County25.5San Francisco County: 25.5 %San Francisco County25.5Santa Clara County: 24.8 %Santa Clara County24.8
%. Source: CDC, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh and later releases), high blood pressure in adults, crude prevalence. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Trinity County40.3
2Modoc County39
3Sierra County38.2
4Mariposa County38.1
5Calaveras County37.5
6Siskiyou County37
7Plumas County36.8
8Nevada County35.5
9Lake County35.1
10Del Norte County34.8
10Tuolumne County34.8
12Amador County34.7
12Tehama County34.7
14Mendocino County34.3
15Alpine County33.2
15Inyo County33.2
17Glenn County32.6
18Shasta County32.1
19Humboldt County32
20Sutter County31.4
21El Dorado County31.3
22Fresno County31
23Ventura County30.9
24Colusa County30.8
24Lassen County30.8
26Butte County30.7
26Napa County30.7
28Stanislaus County30.6
29Tulare County30.4
30Imperial County30.3
30Solano County30.3
32Kern County30.1
32Madera County30.1
32Merced County30.1
35Placer County29.9
35San Luis Obispo County29.9
37San Bernardino County29.8
38Sacramento County29.7
38Sonoma County29.7
40Yuba County29.6
41Santa Cruz County29.4
42San Joaquin County29.1
43Mono County29
43Monterey County29
45Kings County28.8
46Riverside County28.6
47Los Angeles County28.2
48Marin County28.1
49Contra Costa County27.9
49Orange County27.9
51San Mateo County27.4
52Alameda County27.2
53Santa Barbara County27
54San Benito County26.7
55Yolo County26
56San Diego County25.5
56San Francisco County25.5
58Santa Clara County24.8

Other periods

About this ranking

Percentage of adults who have ever been told by a doctor, nurse or other health professional that they have high blood pressure. 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 2021; its eight former counties are not served. The question is asked in odd years only.

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 and later releases), high blood pressure 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 and later releases), high blood pressure in adults, crude prevalence (Counties in California by high blood pressure 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 and later releases), high blood pressure in adults, crude prevalence, Counties in California by high blood pressure 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-high-blood-pressure-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 and later releases), high blood pressure in adults, crude prevalence. Counties in California by high blood pressure 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-high-blood-pressure-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 and later releases), high blood pressure in adults, crude prevalence, Counties in California by high blood pressure in adults, local model estimate, 2021 [Dataset]. Available at: https://www.cdc.gov/places/, via Invokely: https://invokely.ai/rankings/adult-high-blood-pressure-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 and later releases), high blood pressure in adults, crude prevalence: Counties in California by high blood pressure 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-high-blood-pressure-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 and later releases), high blood pressure 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 and later releases), high blood pressure in adults, crude prevalence: Counties in California by high blood pressure 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-high-blood-pressure-rate-county-estimate/california-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/adult-high-blood-pressure-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 and later releases), high blood pressure 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 California by high blood pressure in adults, local model estimate using official data, and cite the source.
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Questions

Which county has the highest high blood pressure in adults, local model estimate?

Trinity County, with 40.3% in 2021, according to the Centers for Disease Control and Prevention.

Which county has the lowest high blood pressure in adults, local model estimate?

Santa Clara County, with 24.8% 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 and later releases), high blood pressure in adults, crude prevalence. Retrieved 2026-10-12.

High blood pressure in adults, local model estimate: other rankings

Counties in California: more rankings