Health by ZIP

St. Charles County, MO health estimates

Missouri. 416,659 residents, 323,865 adults (the Census population estimates that PLACES uses). 14 ZIP Codes and 17 places with estimates.

Compare with another placeZIP Codes of the county (CSV)

St. Charles County in Missouri. Boundaries: US Census Bureau.

The figures are model-based estimates for the adults of an area. They are not measurements. They say nothing about one person.

We do not produce estimates for individuals; only aggregated results for counties, places, census tracts, or ZCTAs.

First, it is not adequate to simply compare point estimates. The confidence intervals should also be considered, and some are very broad.

Centers for Disease Control and Prevention, PLACES Frequently Asked Questions (page dated 11 Dec 2025, read on 2 Oct 2026)

PLACES 2025 release. Survey years (BRFSS): 2022 and 2023. CDC updated the data on . What an estimate is. How to read an interval. The site gives no medical advice.

CDC estimates that 35.7% of the adults of St. Charles County, MO have obesity.

The 95% confidence interval is 30.6% to 41.4%.

PLACES 2025, BRFSS 2023.

Report card: 40 measures by CDC category

Crude prevalence is the estimated share of all adults. Age-adjusted prevalence uses the 2000 US standard population, so that areas with different ages can be compared. CDC: Age-adjusted estimates are only available at the county and place-level.

"Higher" or "lower": the two 95% confidence intervals do not overlap. "Similar": they overlap. Against the state figure, which has no interval, the words are "above", "below" and "in line".

Health outcomes: St. Charles County, MO
MeasureEstimate and interval on a scale of 0 to 50%Estimate95% intervalMO figure (site aggregate)United States
All teeth lost among adults aged ≥65 yearsBRFSS 202212.1%9.4 to 15.115.8%below12.2%similar12.9%10.0 to 16.016.0%in line12.6%similar
Arthritis among adultsBRFSS 202326.3%23.5 to 29.428.8%in line25.4%similar22.8%20.3 to 25.525.2%in line21.9%similar
Cancer (non-skin) or melanoma among adultsBRFSS 20239.0%8.2 to 10.08.6%in line7.9%higherinterval 7.8 to 8.17.6%6.9 to 8.47.2%in line6.6%higherinterval 6.4 to 6.7
Chronic obstructive pulmonary disease among adultsBRFSS 20235.8%4.8 to 7.18.0%below6.2%similar5.1%4.1 to 6.07.0%below5.3%similar
Coronary heart disease among adultsBRFSS 20235.6%4.8 to 6.46.8%below6.4%similar4.6%4.0 to 5.35.6%below5.3%similar
Current asthma among adultsBRFSS 202310.0%8.9 to 11.310.6%in line9.8%similar10.1%8.9 to 11.410.7%in line9.8%similar
Depression among adultsBRFSS 202322.8%19.8 to 26.224.3%in line20.2%similar23.5%20.4 to 27.025.1%in line20.7%similar
Diagnosed diabetes among adultsBRFSS 202310.3%8.9 to 11.912.1%below12.0%similar8.8%7.6 to 10.210.4%below10.3%similar
High blood pressure among adultsBRFSS 202331.9%28.6 to 35.536.5%below34.4%similar28.4%25.4 to 31.833.0%below30.7%similar
High cholesterol among adults who have ever been screenedBRFSS 202336.9%33.2 to 40.737.5%in line37.4%similar32.1%28.5 to 35.832.5%in line32.2%similar
Obesity among adultsBRFSS 202335.7%30.6 to 41.436.6%in line32.8%similar35.5%30.4 to 41.036.8%in line32.9%similar
Stroke among adultsBRFSS 20232.8%2.4 to 3.23.6%below3.4%lowerinterval 3.3 to 3.52.4%2.1 to 2.73.1%below2.9%lowerinterval 2.8 to 3.0
Prevention: St. Charles County, MO
MeasureEstimate and interval on a scale of 0 to 90%Estimate95% intervalMO figure (site aggregate)United States
Cholesterol screening among adultsBRFSS 202386.9%84.7 to 88.884.5%above87.5%similar85.1%82.6 to 87.382.8%in line85.6%similar
Colorectal cancer screening among adults aged 45–75 yearsBRFSS 202268.2%62.8 to 73.364.0%in line66.3%similar63.9%58.3 to 69.258.4%in line54.1%higherinterval 53.7 to 54.6
Current lack of health insurance among adults aged 18-64 yearsBRFSS 20236.4%4.9 to 8.38.7%below11.0%lowerinterval 10.7 to 11.36.7%5.1 to 8.79.0%below11.5%lowerinterval 11.2 to 11.9
Mammography use among women aged 50-74 yearsBRFSS 202278.0%69.8 to 84.474.7%in line76.5%similar77.4%69.2 to 84.074.2%in line76.0%similar
Taking medicine to control high blood pressure among adults with high blood pressureBRFSS 202377.2%74.2 to 80.077.2%in line77.0%similar57.7%53.4 to 61.958.8%in line57.5%similar
Visited dentist or dental clinic in the past year among adultsBRFSS 202266.0%62.2 to 69.560.4%above63.9%similar65.6%61.8 to 69.159.8%above63.4%similar
Visits to doctor for routine checkup within the past year among adultsBRFSS 202378.2%75.0 to 81.478.4%in line77.7%similar76.3%72.8 to 79.676.5%in line75.7%similar
Health risk behaviors: St. Charles County, MO
MeasureEstimate and interval on a scale of 0 to 50%Estimate95% intervalMO figure (site aggregate)United States
Binge drinking among adultsBRFSS 202318.5%15.7 to 21.616.3%in line15.2%higherinterval 15.0 to 15.520.2%17.1 to 23.517.8%in line16.6%higherinterval 16.3 to 16.9
Current cigarette smoking among adultsBRFSS 202312.2%9.7 to 15.116.0%below11.4%similar12.2%9.7 to 15.316.4%below11.6%similar
No leisure-time physical activity among adultsBRFSS 202323.2%19.2 to 27.428.8%below24.5%similar22.2%18.5 to 26.427.8%below23.7%similar
Short sleep duration among adultsBRFSS 202239.9%34.3 to 45.636.5%in line36.0%similar40.6%34.9 to 46.337.5%in line36.8%similar
Disability: St. Charles County, MO
MeasureEstimate and interval on a scale of 0 to 40%Estimate95% intervalMO figure (site aggregate)United States
Any disability among adultsBRFSS 202331.4%27.1 to 35.936.2%below30.0%similar30.0%25.9 to 34.434.5%below28.3%similar
Cognitive disability among adultsBRFSS 202314.1%12.0 to 16.517.2%below13.7%similar14.7%12.5 to 17.317.8%below14.1%similar
Hearing disability among adultsBRFSS 20237.1%6.2 to 8.18.3%below6.7%similar6.2%5.4 to 7.17.2%below5.8%similar
Independent living disability among adultsBRFSS 20236.7%5.6 to 7.99.2%below7.9%similar6.6%5.5 to 7.89.0%below7.6%similar
Mobility disability among adultsBRFSS 202311.7%9.6 to 13.815.8%below13.5%similar10.1%8.3 to 11.913.8%below11.7%similar
Self-care disability among adultsBRFSS 20232.7%2.3 to 3.23.9%below3.8%lowerinterval 3.6 to 3.92.5%2.1 to 2.93.6%below3.4%lowerinterval 3.3 to 3.6
Vision disability among adultsBRFSS 20233.5%3.0 to 4.05.1%below5.5%lowerinterval 5.4 to 5.73.3%2.8 to 3.84.8%below5.2%lowerinterval 5.1 to 5.4
Health status: St. Charles County, MO
MeasureEstimate and interval on a scale of 0 to 30%Estimate95% intervalMO figure (site aggregate)United States
Fair or poor self-rated health status among adultsBRFSS 202315.2%12.6 to 18.020.5%below19.2%lowerinterval 18.9 to 19.514.4%12.0 to 17.019.6%below18.3%lowerinterval 18.0 to 18.6
Frequent mental distress among adultsBRFSS 202315.1%13.1 to 17.217.5%below15.6%similar16.1%13.9 to 18.218.5%below16.3%similar
Frequent physical distress among adultsBRFSS 202311.9%10.1 to 13.714.2%below12.8%similar11.1%9.6 to 12.913.4%below12.1%similar

ZIP Codes in St. Charles County

ZIP Codes in St. Charles County, MO, in ZIP Code order
ZIP CodeResidentsEstimate95% confidence intervalAgainst St. Charles County
ZIP Code 6330150,89036.3%30.9 to 41.9similar
ZIP Code 6330347,29235.0%29.6 to 40.6similar
ZIP Code 6330442,02835.1%29.6 to 40.7similar
ZIP Code 633321,40635.3%29.7 to 40.9similar
ZIP Code 633413,78435.5%30.4 to 41.2similar
ZIP Code 6334810,05136.6%32.1 to 41.3similar
ZIP Code 633656332.5%26.9 to 38.1similar
ZIP Code 6336653,86137.2%31.7 to 42.8similar
ZIP Code 6336727,00935.1%29.4 to 40.7similar
ZIP Code 6336846,00734.7%29.3 to 40.3similar
ZIP Code 6337361738.4%32.5 to 44.3similar
ZIP Code 6337676,06436.2%30.8 to 41.9similar
ZIP Code 6338547,75636.4%30.9 to 42.0similar
ZIP Code 6338639739.2%33.3 to 45.0similar

The dashed line in each drawing is St. Charles County. The words are "higher" or "lower" when the two 95% confidence intervals do not overlap, and "similar" when they overlap. The table is in name order. The intervals of many rows overlap, so the table gives no rank.

A ZIP Code is in the county that holds the largest share of its land. A ZIP Code that is in two counties shows one time. Download the ZIP Codes of St. Charles County as a CSV file, with all measures.

Cities and places in St. Charles County

Places in St. Charles County, MO, in name order
PlaceResidentsEstimate95% confidence intervalAgainst St. Charles County
Augusta27035.6%29.8 to 41.4similar
Cottleville5,61135.4%29.9 to 40.9similar
Dardenne Prairie12,74334.9%29.5 to 40.6similar
Defiance15936.3%30.7 to 42.3similar
Flint Hill98137.0%31.1 to 42.7similar
Josephville51237.2%31.4 to 43.1similar
Lake St. Louis16,70734.9%29.3 to 40.4similar
New Melle54134.4%28.8 to 39.9similar
O'Fallon91,31635.9%30.5 to 41.5similar
Portage Des Sioux33538.1%32.3 to 44.0similar
St. Charles70,49335.9%30.4 to 41.4similar
St. Paul3,00536.5%30.9 to 42.1similar
St. Peters57,73236.3%30.8 to 42.0similar
Weldon Spring5,32633.0%27.6 to 38.2similar
Weldon Spring Heights9331.2%25.8 to 36.8similar
Wentzville44,37236.6%31.1 to 42.2similar
West Alton35939.4%33.5 to 45.2similar

The dashed line in each drawing is St. Charles County. The words are "higher" or "lower" when the two 95% confidence intervals do not overlap, and "similar" when they overlap. The table is in name order. The intervals of many rows overlap, so the table gives no rank.

Estimates in earlier PLACES releases

The current modeling procedure does not support using the estimates to track changes at the local level over time.

Centers for Disease Control and Prevention, PLACES Frequently Asked Questions (page dated 11 Dec 2025, read on 2 Oct 2026)

The table lists what each PLACES release published for St. Charles County, MO, for 12 of the 40 measures.

St. Charles County, MO: crude prevalence and 95% confidence interval in each PLACES release
Measure2022 release2023 release2024 release2025 release
COPD6.0%5.0 to 7.16.1%4.9 to 7.56.7%5.9 to 7.55.8%4.8 to 7.1
Coronary Heart Disease5.9%5.3 to 6.55.5%4.7 to 6.36.1%5.4 to 6.95.6%4.8 to 6.4
Current Asthma8.6%8.2 to 9.18.9%7.8 to 10.110.2%8.8 to 11.710.0%8.9 to 11.3
Depression22.0%20.8 to 23.222.9%19.6 to 26.322.7%19.2 to 26.322.8%19.8 to 26.2
Diabetes8.4%7.8 to 9.19.2%7.8 to 10.69.9%8.4 to 11.610.3%8.9 to 11.9
High Blood Pressure27.7%26.4 to 29.032.3%28.9 to 35.632.2%29.0 to 35.631.9%28.6 to 35.5
Obesity30.6%29.0 to 32.037.3%32.4 to 42.336.3%30.4 to 42.335.7%30.6 to 41.4
Health Insurance12.0%10.0 to 14.58.5%6.5 to 11.16.6%5.9 to 7.66.4%4.9 to 8.3
Binge Drinking19.7%19.0 to 20.418.1%15.5 to 21.120.4%16.7 to 24.118.5%15.7 to 21.6
Current Cigarette Smoking14.6%11.5 to 17.413.3%10.2 to 16.515.8%13.7 to 18.112.2%9.7 to 15.1
Physical Inactivity21.0%18.3 to 23.821.5%17.7 to 25.422.4%18.8 to 26.323.2%19.2 to 27.4
General Health11.6%10.0 to 13.613.3%11.0 to 15.715.2%13.3 to 17.315.2%12.6 to 18.0

Official sources

The links open the pages of the agencies in a new tab.

Cite this page

Health by ZIP. St. Charles County, MO: CDC PLACES estimates, 2025 release. Source: Centers for Disease Control and Prevention, PLACES: Local Data for Better Health. CDC updated the data on 4 Dec 2025. https://healthbyzip.com/county/mo/st-charles-county/

The address of this page stays the same. CDC's own citation is at the foot of the page.

Where the figures come from

Source: Centers for Disease Control and Prevention, PLACES: Local Data for Better Health, 2025 release. CDC updated the data on . The page shows the 2022, 2023, 2024 releases as a record. The data are a US government work in the public domain. Data set on data.cdc.gov. The boundaries and the links between ZIP Codes, counties and places come from the US Census Bureau. Percentages have one decimal, as CDC publishes them. A state figure is a site aggregate: the site computes it. The site corrects an error of its own processing at the next build. See corrections.

Questions about St. Charles County, MO

How does the obesity estimate of St. Charles County, MO compare with Missouri?

The Missouri figure is 36.6% (site aggregate).

It has no confidence interval.

The Missouri figure is inside the interval of St. Charles County, MO. The estimate is in line with it.

How does the obesity estimate of St. Charles County, MO compare with the nation?

The US estimate is 32.8%.

The 95% confidence interval is 32.4% to 33.1%.

The two intervals overlap. The estimate for St. Charles County, MO is similar.

What does CDC estimate for diagnosed diabetes in St. Charles County, MO?

CDC estimates that 10.3% of the adults of St. Charles County, MO have diagnosed diabetes.

The 95% confidence interval is 8.9% to 11.9%.

PLACES 2025, BRFSS 2023.

For how many measures is St. Charles County, MO above or below the Missouri figure?

St. Charles County, MO and the Missouri figure both have a value for 40 measures.

The estimate for St. Charles County, MO is above the Missouri figure for 2 measures.

It is below the Missouri figure for 25 measures.

It is in line with the Missouri figure for 13 measures.