City safety & data profile

Lake Saint LouisMO

Lake Saint Louis, MO is a 15K-resident city in St. Charles County with a median household income of $125,693.

St. Charles County, Missouri. Federal health, economic, and safety indicators for Lake Saint Louis, drawn from the U.S. Census Bureau American Community Survey, CDC PLACES, and CMS Hospital Compare. Lake Saint Louis has a population larger than 25% of the 4,640 U.S. cities Areazine tracks, a median home value of $405,900, and 1 hospital serving the surrounding area.

Data updated 2026-07-20

15K
Population
Top 75%
By size
$125,693
Median income
$405,900
Median home
4.3%
Poverty rate

The read on Lake Saint Louis

Lake Saint Louis posts a median household income higher than 85% of U.S. cities Areazine tracks, where 1 hospital serves the Lake Saint Louis area.

Top 15%
by median income, US cities
1
hospital in & near Lake Saint Louis

Where Lake Saint Louis income ranks nationally

Median household income vs. every place Areazine profiles (place-level ACS)

$125,693 Top 15% higher than 85% of 3,889 places Areazine profiles

$0–$20,000: 0 places Areazine profiles (0%). Below this entry. $20,000–$40,000: 71 places Areazine profiles (2%). Below this entry. $40,000–$60,000: 788 places Areazine profiles (20%). Below this entry. $60,000–$80,000: 1,055 places Areazine profiles (27%). Below this entry. $80,000–$100,000: 768 places Areazine profiles (20%). Below this entry. $100,000–$120,000: 515 places Areazine profiles (13%). Below this entry. $120,000–$140,000: 308 places Areazine profiles (8%). This entry sits in this band. $140,000–$160,000: 171 places Areazine profiles (4%). Above this entry. $160,000–$180,000: 92 places Areazine profiles (2%). Above this entry. $180,000–$200,000: 47 places Areazine profiles (1%). Above this entry. $200,000–$220,000: 28 places Areazine profiles (1%). Above this entry. $220,000–$240,000: 18 places Areazine profiles (0%). Above this entry. $240,000–$260,000: 28 places Areazine profiles (1%). Above this entry. MO $0 $260,000 every profiled place, bucketed by value

Each bar is a $20K-wide band; taller bars hold more places Areazine profiles. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, American Community Survey (place-level) · 2024 ACS 5-year

The quick read

Reading Lake Saint Louis, MO beyond the headline numbers

Lake Saint Louis sits inside St. Charles County, Missouri, at roughly 38.80°N, -90.79°W. Population 14,545, $125,693 median household income. Median home value $405,900, median rent $1,588. Poverty rate 4.3%, read against that income figure since two cities on the same median can differ underneath it.

CDC PLACES: Lake Saint Louis's highest-prevalence health measure is short sleep duration at 38.1%, then obesity at 34.9%. 1 hospital in/around Lake Saint Louis, 3/5 avg rating, 1 with an ER.

Sources: U.S. Census ACS, CDC PLACES, CMS Hospital Compare, plus live alerts for Lake Saint Louis from FEMA, NOAA, FDA, and CPSC. Comparison bars benchmark each metric against the national reference.

Population
14,545
Lake Saint Louis
Median Income
$125,693
+85% vs avg
Median Home Value
$405,900
+78% vs avg
Median Age
42.7
years

10-Year Trends 2013–2024

County-level trend (St. Charles County) - Lake Saint Louis's own historical series isn't separately published by the Census Bureau, so these year-over-year figures track the surrounding county, not the city alone.

20132024
Population
415K+14%
Median Income
$104,692+47%
Median Home Value
$320,800+70%
Poverty Rate
5.2%-10%
Unemployment
2.9%-57%

Economics

Economics indicators for Lake Saint Louis, MO
IndicatorValue
Median Rent
$1,588/mo
Poverty Rate
4.3% -70% vs avg
Unemployment 4.7%
Bachelor's Degree+ 51.7%
Work From Home 21.9%
Public Transit 0%

Population

White 85.4%
African American 5.5%
Asian 1.9%
Two or More Ethnicities 4.7%

Health Profile 15 measures

Health Indicators

Short Sleep Duration
38.1%
Obesity
34.9%
High Blood Pressure
33.6%
Physical Inactivity
22.2%
Binge Drinking
17.7%
Frequent Mental Distress
14.1%
Frequent Physical Distress
11.8%
Current Smoking
11.1%
Diabetes
10.8%
Current Asthma
10%

Preventive Care

Dental Visit 69.6%
Annual Checkup 79.7%

Other Measures

Coronary Heart Disease
6.1%
Lack of Health Insurance
5.6%
Stroke
3%

Hospitals 1 total

Rating Distribution
★★★★★
0
★★★★
0
★★★
1
★★
0
★
0
Average Rating
3/5
Total Hospitals
1
With ER
1
SSM ST JOSEPH HOSPITAL WEST
LAKE SAINT LOUIS · Acute Care Hospitals · ER
★★★☆☆

Frequently Asked Questions 6

What is the population of Lake Saint Louis, MO? ▼
Lake Saint Louis, MO has a population of 14,545 people, located in St. Charles County, Missouri.
What is the median household income in Lake Saint Louis? ▼
The median household income in Lake Saint Louis, MO is $125,693 per year, per the U.S. Census ACS. The poverty rate is 4.3%.
What is the median home value in Lake Saint Louis? ▼
The median home value in Lake Saint Louis, MO is $405,900. Median rent is $1,588/month.
What are the top health concerns in Lake Saint Louis? ▼
The top health indicators in Lake Saint Louis include Short Sleep Duration (38.1%), Obesity (34.9%), High Blood Pressure (33.6%). Data from CDC PLACES.
How many hospitals are in Lake Saint Louis? ▼
Lake Saint Louis has 1 hospital with an average rating of 3/5 stars. 1 have emergency departments.
What is the median age in Lake Saint Louis? ▼
The median age in Lake Saint Louis, MO is 42.7 years. 51.7% of residents have a bachelor's degree or higher.

Safety Context

Lake Saint Louis, MO is located in St. Charles County, Missouri. With a population of 15K and a $125,693 median household income, the community faces health challenges including short sleep duration and obesity. Residents have access to 1 hospital with an average rating of 3/5 stars. Safety alerts for the Lake Saint Louis area are monitored from federal and state agencies including FEMA, NOAA, FDA, and CPSC.

Safety Guides

How Product Recalls Work

CPSC, FDA & NHTSA recall process explained

Understanding Weather Alerts

Watch vs warning vs advisory explained

Earthquake Magnitude Explained

What the numbers mean & when to act
All safety guides →

Primary source data

EPA Outdoor Air Quality Data

Federal monitoring network, every measurement we report

AirNow - Missouri

Real-time AQI for every monitored Missouri location

National Weather Service

NOAA active watches, warnings, advisories

CDC Air Quality & Health

Health-impact reference for every AQI category

EPA NAAQS standards

National Ambient Air Quality Standards, the regulatory thresholds

Nearby Cities 8

Dardenne Prairie, MO 13K Wentzville, MO 36K O'Fallon, MO 85K Saint Peters, MO 53K Wildwood, MO 36K Chesterfield, MO 48K Troy, MO 12K Saint Charles, MO 66K
All cities in Missouri → Compare Lake Saint Louis vs Dardenne Prairie → All comparisons → Browse all cities

Using Lake Saint Louis's profile

Use this as a starting research checklist, not a verdict on whether to live here.

  • Check live recalls, weather and hazard alerts scoped to the Lake Saint Louis area before relying on national headlines. Check your area
  • Read the poverty rate alongside the income figure, two places with the same median can have very different realities.
  • Compare Lake Saint Louis against Missouri peers on any ranking lens. Explore Missouri

Population and economics (income, home value, poverty, education) are place-level U.S. Census ACS; health is CDC PLACES; hospital counts reflect facilities in and around the city.

Data Sources

All data on this page comes from official U.S. government sources. Population and economic data from the Census Bureau American Community Survey (2024 5-year estimates, place geography). Health data from the CDC PLACES program (2023). Hospital ratings from CMS Hospital Compare (2024). Climate data from NOAA. Education data from NCES. Cost of living from Bureau of Economic Analysis. Crime statistics, where referenced on Areazine, originate from the FBI Crime Data Explorer. Housing market figures referenced on Areazine come from HUD Fair Market Rents. Census economics and population are at place geography; some health and hospital indicators are reported at the county level (St. Charles County) where that is the smallest published unit.

Every figure on Areazine is published directly from official U.S. government sources, no number is typed in by an editor. City demographic and health figures are compiled directly from U.S. Census, CDC, and CMS releases, updated quarterly within 30 days of upstream release. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026.