States › California › Kern County › Onyx
Place · Kern County, California
Onyx, CA
457 residents in the 2020 Census, 394 adults. Incorporated place or census-designated place; CDC PLACES 2025 release.
- Kern County
- California
- Crude and age-adjusted estimates
- Small population: intervals are wide
Onyx, in Kern County, California, has 457 residents in the 2020 Census (394 adults). CDC's PLACES project estimates 40 health measures for its adult population using a statistical model, not a local survey.
In the 2025 release it estimates that 36.2% of adults have obesity (95% confidence interval 30.5–41.9%), similar to Kern County's 36.0%, above the California figure of 27.8% (site aggregate), similar to the national estimate of 32.8%. Where intervals overlap the figures are described as similar, because the model cannot separate them.
Diagnosed diabetes: 16.8% of adults (95% confidence interval 14.5–19.3%) in the 2025 release, similar to Kern County's 13.3%, above the California figure of 11.7% (site aggregate), higher than the national estimate of 12.0%.
Across the 40 measures published for both, the interval for Onyx lies entirely above the Kern County interval for 12 measures, entirely below it for 3 and overlaps it for 25.
Report card: 40 measures by CDC category
Crude prevalence is the estimated share of all adults. Age-adjusted prevalence is standardised to the 2000 US standard population so that areas with different age structures can be compared. CDC: "Age-adjusted estimates are only available at the county and place-level."
estimate with 95% intervalKern Co.CA figureUS estimate
Health outcomes (12)vs Kern Co.: 7 higher · 0 lower · 5 similar
Prevention (7)vs Kern Co.: 3 higher · 1 lower · 3 similar
Health risk behaviors (4)vs Kern Co.: 0 higher · 0 lower · 4 similar
Disability (7)vs Kern Co.: 2 higher · 0 lower · 5 similar
Health status (3)vs Kern Co.: 0 higher · 0 lower · 3 similar
Health-related social needs (7)vs Kern Co.: 0 higher · 2 lower · 5 similar
Flags: Co. = Kern County, St. = California figure (site aggregate, no interval: above, below or in line), US = national estimate. ↑ interval entirely above, ↓ entirely below, ≈ overlapping or containing the reference. Release column in colour: not published for this place in the 2025 release, most recent published release shown.
Compared with county, state and nation
| Measure (crude) | Onyx | Kern County | California (site aggregate) | United States |
|---|---|---|---|---|
| Obesity | 36.2% 30.5–41.9 | 36.0% 30.6–41.6 · similar | 27.8% above | 32.8% 32.4–33.1 · similar |
| Diabetes | 16.8% 14.5–19.3 | 13.3% 11.6–15.1 · similar | 11.7% above | 12.0% 11.8–12.2 · higher |
| High Blood Pressure | 43.8% 39.7–47.6 | 32.0% 28.6–35.3 · higher | 30.5% above | 34.4% 34.0–34.7 · higher |
| Current Asthma | 11.5% 10.1–13.0 | 10.3% 9.2–11.6 · similar | 9.3% above | 9.8% 9.6–10.0 · higher |
| COPD | 11.0% 9.1–13.1 | 6.4% 5.5–7.4 · higher | 5.1% above | 6.2% 6.1–6.3 · higher |
| Coronary Heart Disease | 10.7% 9.4–12.1 | 6.2% 5.5–7.0 · higher | 5.6% above | 6.4% 6.2–6.5 · higher |
| Depression | 25.1% 21.8–28.6 | 22.8% 19.7–26.0 · similar | 20.1% above | 20.2% 19.9–20.5 · higher |
| Current Cigarette Smoking | 15.5% 12.6–19.0 | 14.6% 12.3–17.1 · similar | 10.9% above | 11.4% 11.2–11.6 · higher |
| Binge Drinking | 14.2% 11.8–16.7 | 16.8% 14.0–19.8 · similar | 15.3% in line | 15.2% 15.0–15.5 · similar |
| Physical Inactivity | 28.9% 24.2–33.7 | 31.9% 27.2–36.6 · similar | 24.6% in line | 24.5% 24.2–24.8 · similar |
| Health Insurance | 7.4% 5.8–9.3 | 16.7% 13.0–20.7 · lower | 10.6% below | 11.0% 10.7–11.3 · lower |
| General Health | 27.3% 23.5–31.2 | 28.1% 24.4–31.9 · similar | 22.1% above | 19.2% 18.9–19.5 · higher |
| Measure (age-adjusted) | Onyx | Kern County | California (site aggregate) | United States |
|---|---|---|---|---|
| Obesity | 35.9% 30.1–41.7 | 36.2% 30.8–41.8 · similar | 27.9% above | 32.9% 32.5–33.2 · similar |
| Diabetes | 11.6% 9.9–13.3 | 13.3% 11.5–15.1 · similar | 10.7% in line | 10.3% 10.1–10.5 · similar |
| High Blood Pressure | 33.3% 29.7–37.1 | 32.2% 28.8–35.7 · similar | 28.5% above | 30.7% 30.4–31.0 · similar |
| Current Asthma | 11.5% 10.2–13.0 | 10.3% 9.1–11.5 · similar | 9.3% above | 9.8% 9.6–10.0 · higher |
| COPD | 7.8% 6.5–9.1 | 6.4% 5.5–7.4 · similar | 4.6% above | 5.3% 5.2–5.4 · higher |
| Coronary Heart Disease | 6.7% 5.9–7.6 | 6.3% 5.6–7.1 · similar | 5.0% above | 5.3% 5.2–5.4 · higher |
| Depression | 27.3% 23.7–31.0 | 22.6% 19.5–25.9 · similar | 20.4% above | 20.7% 20.4–21.0 · higher |
| Current Cigarette Smoking | 16.2% 13.0–19.8 | 14.7% 12.3–17.2 · similar | 11.0% above | 11.6% 11.4–11.9 · higher |
| Binge Drinking | 18.9% 15.9–22.2 | 16.7% 13.9–19.6 · similar | 16.2% in line | 16.6% 16.3–16.9 · similar |
| Physical Inactivity | 25.4% 21.3–29.8 | 32.1% 27.4–36.9 · similar | 24.2% in line | 23.7% 23.4–24.0 · similar |
| Health Insurance | 8.3% 6.4–10.5 | 16.7% 13.0–20.7 · lower | 10.7% below | 11.5% 11.2–11.9 · lower |
| General Health | 23.9% 20.3–27.7 | 28.2% 24.4–32.1 · similar | 21.6% in line | 18.3% 18.0–18.6 · higher |
Twelve headline measures; the toggle above switches between crude and age-adjusted. State figures are population-weighted county estimates computed by this site and carry no interval; the county and US columns carry CDC's 95% intervals.
Estimates by release
What each PLACES release published for Onyx (crude prevalence with 95% interval). CDC advises that the estimates cannot be used to track local change over time: each release re-models a different survey year onto a fixed population, intervals usually overlap and the interval method changed in 2023. Listed for reference only. The 2022 and 2023 columns use 2010-vintage Census geographies for ZIP Codes and places (the same code may have covered a different area); 2024 onward use 2020 geographies.
| Measure | 2022 release | 2023 release | 2024 release | 2025 release |
|---|---|---|---|---|
| COPD | 12.9% 11.2–14.7 | 11.9% 9.9–14.3 | 11.8% 10.6–13.1 | 11.0% 9.1–13.1 |
| Coronary Heart Disease | 10.7% 9.8–11.7 | 9.7% 8.4–11.1 | 11.0% 9.9–12.2 | 10.7% 9.4–12.1 |
| Current Asthma | 11.3% 10.8–12.0 | 11.2% 9.8–12.6 | 11.2% 9.9–12.6 | 11.5% 10.1–13.0 |
| Depression | 20.8% 19.7–22.0 | 21.8% 18.1–25.6 | 23.2% 20.1–26.5 | 25.1% 21.8–28.6 |
| Diabetes | 15.4% 14.3–16.5 | 16.1% 13.9–18.7 | 16.0% 14.0–18.2 | 16.8% 14.5–19.3 |
| High Blood Pressure | 40.8% 39.2–42.3 | 42.2% 37.6–46.5 | 41.3% 37.0–45.5 | 43.8% 39.7–47.6 |
| Obesity | 35.5% 33.8–37.2 | 37.6% 31.3–44.2 | 35.8% 30.4–41.5 | 36.2% 30.5–41.9 |
| Health Insurance | 9.8% 8.1–11.8 | 7.8% 5.9–9.8 | 7.7% 6.1–9.8 | 7.4% 5.8–9.3 |
| Binge Drinking | 14.3% 13.7–15.0 | 13.0% 10.6–15.6 | 14.6% 12.1–17.4 | 14.2% 11.8–16.7 |
| Current Cigarette Smoking | 18.0% 14.8–21.4 | 19.5% 15.5–23.9 | 17.3% 15.2–19.5 | 15.5% 12.6–19.0 |
| Physical Inactivity | 26.2% 23.2–29.2 | 26.4% 21.7–31.4 | 28.7% 25.0–32.7 | 28.9% 24.2–33.7 |
| General Health | 22.7% 19.9–25.7 | 24.3% 20.9–28.1 | 25.2% 22.8–27.7 | 27.3% 23.5–31.2 |
Nearby
All 85 places and 46 ZIP Codes in Kern County · California (1,545 places).
Questions and answers
What share of adults in Onyx have obesity, according to PLACES?
PLACES estimates 36.2% (95% confidence interval 30.5–41.9%) in the 2025 release, based on 2023 BRFSS responses modelled onto the area's adult population. It is a modelled estimate for the whole adult population of the area, not a count of diagnoses.
How common is diagnosed diabetes in Onyx?
PLACES estimates 16.8% of adults (95% confidence interval 14.5–19.3%) in the 2025 release. The national estimate in the same release is 12.0%.
Is Onyx different from Kern County on obesity?
The 95% confidence intervals for Onyx and Kern County overlap for obesity, so the estimates are described as similar; the model cannot separate them.
Can these figures describe a person who lives in Onyx?
No. CDC states: "We do not produce estimates for individuals; only aggregated results for counties, places, census tracts, or ZCTAs." The figures describe the expected prevalence across the area's adult population given its demographic make-up and its county and state; they say nothing about any resident.
Can Onyx be ranked or tracked over time with these figures?
CDC advises that the data "should not be used for ranking the overall health of any county, place, census tract, or ZCTA" and that the modelling procedure "does not support using the estimates to track changes at the local level over time". Areas can be compared on individual measures, with their confidence intervals; this site lists estimates by release for reference only.
Where does this data come from?
CDC PLACES: Local Data for Better Health, 2025 release (data updated 4 Dec 2025), which models Behavioral Risk Factor Surveillance System responses with Census population and American Community Survey data. Earlier releases (2022, 2023, 2024) are shown for reference. Boundaries and ZIP-to-county relationships are from the US Census Bureau.
Provenance
Source: Centers for Disease Control and Prevention, PLACES: Local Data for Better Health, 2025 release (data updated 4 Dec 2025), with the 2022, 2023, 2024 releases for reference; US government work, public domain. Dataset on data.cdc.gov. Boundaries and ZIP-to-county relationships: US Census Bureau. Percentages are shown to one decimal as CDC publishes them; state figures are population-weighted means computed by this site. The county is the one containing the centroid CDC publishes for the place, tested against the Census 20m county outlines. Processing errors are corrected at the next daily build; see corrections. Generated 1 Oct 2026.