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Mercer County, New Jersey

Low risk

Gera County Health Risk Index: 29.5/100 · National rank 410 of 480 · Population: 381,671 · CDC PLACES June 2026

What is the chronic-disease health risk in Mercer County, New Jersey?

As of June 2026, Mercer County, New Jersey has a Gera County Health Risk Index of 29.5/100 (national rank 410/480; low risk). Adult chronic-disease prevalence: obesity 25.4%, diabetes 11.1%, coronary heart disease 5.4%, smoking 10.5%. 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 Index29.5 / 100Rank 410 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 — Mercer County (CDC PLACES June 2026)

Mercer County, New Jersey — CDC PLACES June 2026 crude prevalence (adults)
MeasurePrevalenceWeight in GCHRI
Obesity25.4%25%
Diagnosed diabetes11.1%25%
Coronary heart disease5.4%30%
Current cigarette smoking10.5%20%
GCHRI composite score29.5 / 100—

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

Mercer County, New Jersey

Population: 381,671 · National rank: 410 / 480 (by chronic-disease risk)

Low risk

Gera County Health Risk Index

29.5 / 100

Obesity

25.4%

adults

Diabetes

11.1%

adults

Heart Disease

5.4%

adults

Smoking

10.5%

adults

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

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Frequently asked questions

What is the Gera County Health Risk Index for Mercer County, NJ?
Mercer County, NJ has a Gera County Health Risk Index (GCHRI) of 29.5/100, ranking 410 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 Mercer County?
The adult obesity prevalence in Mercer County, NJ is 25.4% (CDC PLACES, June 2026, crude prevalence). The national mean across the 480 included counties is 25.4%.
What is the diabetes rate in Mercer County?
The diagnosed diabetes prevalence among adults in Mercer County, NJ is 11.1% (CDC PLACES, June 2026, crude prevalence).
What is the coronary heart disease rate in Mercer County?
The coronary heart disease prevalence among adults in Mercer County, NJ is 5.4% (CDC PLACES, June 2026, crude prevalence).
What is the smoking rate in Mercer County?
The current cigarette smoking prevalence among adults in Mercer County, NJ is 10.5% (CDC PLACES, June 2026, crude prevalence).

Concerned about health risks in Mercer 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.