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Contra Costa County, California

Low risk

Gera County Health Risk Index: 30.6/100 · National rank 400 of 480 · Population: 1,155,025 · CDC PLACES June 2026

What is the chronic-disease health risk in Contra Costa County, California?

As of June 2026, Contra Costa County, California has a Gera County Health Risk Index of 30.6/100 (national rank 400/480; low risk). Adult chronic-disease prevalence: obesity 28.0%, diabetes 11.3%, coronary heart disease 5.5%, smoking 9.3%. Source: CDC PLACES June 2026.

Source:CDC PLACES: Local Data for Better Health, County Data 2023 release·as of June 2026updated annually (last: )
Gera County Health Risk Index30.6 / 100Rank 400 of 480 most-populous US counties. Computed from CDC PLACES June 2026 crude prevalence for 4 chronic-disease measures, weighted and normalised 0–100. Higher = higher risk.How this index is calculated

Chronic-disease prevalence — Contra Costa County (CDC PLACES June 2026)

Contra Costa County, California — CDC PLACES June 2026 crude prevalence (adults)
MeasurePrevalenceWeight in GCHRI
Obesity28.0%25%
Diagnosed diabetes11.3%25%
Coronary heart disease5.5%30%
Current cigarette smoking9.3%20%
GCHRI composite score30.6 / 100—

Check another county's health risk

Search any of the 480 most-populous US counties to compare GCHRI scores and CDC prevalence rates.

Contra Costa County, California

Population: 1,155,025 · National rank: 400 / 480 (by chronic-disease risk)

Low risk

Gera County Health Risk Index

30.6 / 100

Obesity

28.0%

adults

Diabetes

11.3%

adults

Heart Disease

5.5%

adults

Smoking

9.3%

adults

Source: CDC PLACES, June 2026 · Crude prevalence, adults · Full county page →

Other counties in California

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Frequently asked questions

What is the Gera County Health Risk Index for Contra Costa County, CA?
Contra Costa County, CA has a Gera County Health Risk Index (GCHRI) of 30.6/100, ranking 400 out of 480 most-populous US counties (rank 1 = highest chronic-disease risk). This places it in the low-risk tier. Source: CDC PLACES (June 2026).
What is the obesity rate in Contra Costa County?
The adult obesity prevalence in Contra Costa County, CA is 28.0% (CDC PLACES, June 2026, crude prevalence). The national mean across the 480 included counties is 28.0%.
What is the diabetes rate in Contra Costa County?
The diagnosed diabetes prevalence among adults in Contra Costa County, CA is 11.3% (CDC PLACES, June 2026, crude prevalence).
What is the coronary heart disease rate in Contra Costa County?
The coronary heart disease prevalence among adults in Contra Costa County, CA is 5.5% (CDC PLACES, June 2026, crude prevalence).
What is the smoking rate in Contra Costa County?
The current cigarette smoking prevalence among adults in Contra Costa County, CA is 9.3% (CDC PLACES, June 2026, crude prevalence).

Concerned about health risks in Contra Costa County?

A GeraClinic care navigator can help you understand what these CDC chronic-disease rates mean for you personally, assess your individual risk factors, and connect you with preventive-care resources — fully online.

Talk to a GeraClinic care navigatorHow the Gera County Health Risk Index is calculated

Contains public sector information published by U.S. Centers for Disease Control and Prevention (CDC) and licensed under the U.S. Public Domain (federal government work, 17 U.S.C. § 105). Source: CDC PLACES: Local Data for Better Health, County Data 2023 release (June 2026, published 2023 (released 2024)).

Informational/educational only — not a substitute for professional medical advice; a clinician interprets results.