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St. Charles County, Missouri

Moderate risk

Gera County Health Risk Index: 39.9/100 · National rank 291 of 480 · Population: 416,659 · CDC PLACES June 2026

What is the chronic-disease health risk in St. Charles County, Missouri?

As of June 2026, St. Charles County, Missouri has a Gera County Health Risk Index of 39.9/100 (national rank 291/480; moderate risk). Adult chronic-disease prevalence: obesity 35.7%, diabetes 10.3%, coronary heart disease 5.6%, smoking 12.2%. 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 Index39.9 / 100Rank 291 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 — St. Charles County (CDC PLACES June 2026)

St. Charles County, Missouri — CDC PLACES June 2026 crude prevalence (adults)
MeasurePrevalenceWeight in GCHRI
Obesity35.7%25%
Diagnosed diabetes10.3%25%
Coronary heart disease5.6%30%
Current cigarette smoking12.2%20%
GCHRI composite score39.9 / 100—

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

St. Charles County, Missouri

Population: 416,659 · National rank: 291 / 480 (by chronic-disease risk)

Moderate risk

Gera County Health Risk Index

39.9 / 100

Obesity

35.7%

adults

Diabetes

10.3%

adults

Heart Disease

5.6%

adults

Smoking

12.2%

adults

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

Other counties in Missouri

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Frequently asked questions

What is the Gera County Health Risk Index for St. Charles County, MO?
St. Charles County, MO has a Gera County Health Risk Index (GCHRI) of 39.9/100, ranking 291 out of 480 most-populous US counties (rank 1 = highest chronic-disease risk). This places it in the moderate-risk tier. Source: CDC PLACES (June 2026).
What is the obesity rate in St. Charles County?
The adult obesity prevalence in St. Charles County, MO is 35.7% (CDC PLACES, June 2026, crude prevalence). The national mean across the 480 included counties is 35.7%.
What is the diabetes rate in St. Charles County?
The diagnosed diabetes prevalence among adults in St. Charles County, MO is 10.3% (CDC PLACES, June 2026, crude prevalence).
What is the coronary heart disease rate in St. Charles County?
The coronary heart disease prevalence among adults in St. Charles County, MO is 5.6% (CDC PLACES, June 2026, crude prevalence).
What is the smoking rate in St. Charles County?
The current cigarette smoking prevalence among adults in St. Charles County, MO is 12.2% (CDC PLACES, June 2026, crude prevalence).

Concerned about health risks in St. Charles 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.