What are the schools like in Lake St. Louis, MO?

Lake St. Louis is served primarily by WENTZVILLE R-IV. The district operates 12 elementary schools, 4 middle schools, and 4 high schools with a student-to-teacher ratio of 13.9:1.

What is the median household income in Lake St. Louis?

The median household income in Lake St. Louis, MO is $114,230 according to the most recent US Census American Community Survey 5-year estimates. The unemployment rate is 3.8%.

What is the weather like in Lake St. Louis, MO?

Lake St. Louis has an average high temperature of 39.3°F in January and 87.5°F in July. Annual precipitation averages 44.4 inches and annual snowfall averages 13.5 inches.

Lake St. Louis, MO Cost of Living, Crime & Is It a Good Place to Live? (2026)

Q: Is Lake St. Louis, MO affordable or expensive?

Lake St. Louis's cost of living index is 96, where 100 represents the national average. This means Lake St. Louis is 4% less expensive than the average US city. The median home value is $357,600 and the median rent is $1,404 per month.

Q: What is the crime rate in Lake St. Louis, MO?

Lake St. Louis has a violent crime rate of 56.9 incidents per 100,000 residents and a property crime rate of 605.2 per 100,000. The national average violent crime rate is approximately 380 per 100,000.

Is Lake St. Louis, MO a Good Place to Live?

Lake St. Louis is a small city of 17,088 in Missouri, with a median household income of $114,230 and a 3.8% unemployment rate. Its cost of living index is 96 (US average = 100), which is 4% below the national average.

Strengths: Lake St. Louis stands out for an affordable cost of living, lower-than-average crime, solid school ratings (A), a well-educated population, short average commutes.

Trade-offs: No major red flags stand out in the available data. Whether Lake St. Louis is right for you depends on your priorities — the full breakdown is below.

All Lake St. Louis city data on this page comes from official government sources — the US Census Bureau, FBI, NCES, BEA, and NOAA — updated annually.

Cost of Living

Index: 96.3

Lake St. Louis's overall cost of living index is 96.3, where 100 represents the US national average. Living in Lake St. Louis costs roughly 4% less than the average American city.

Metric	Lake St. Louis, MO	National Avg
Median Home Value	$357,600	$244,900
Median Monthly Rent	$1,404	$1,163
Homeownership Rate	78.5%	65.9%
Median Household Income	$114,230	$74,755

Crime & Safety

Very Safe

Lake St. Louis's violent crime rate is 56.9 per 100,000 residents — 85% lower than the national average of ~380 per 100,000.

Violent Crime

56.9 /100k

Property Crime

605.2 /100k

Vertical marker = national average. Source: FBI UCR Program.

Schools & Education

Lake St. Louis is served primarily by WENTZVILLE R-IV. The student-to-teacher ratio is 13.9:1 (better than the national average of ~16:1).

Metric	Lake St. Louis, MO	National Avg
School District	WENTZVILLE R-IV	—
Elementary Schools	12	—
Middle Schools	4	—
High Schools	4	—
Student/Teacher Ratio	13.9:1	16:1
Bachelor's Degree or Higher	49.7%	35.4%
High School Diploma or Higher	96.6%	91.1%

Weather & Climate

Lake St. Louis sees average highs of 39.3°F in January and 87.5°F in July, with 44.4 inches of annual precipitation and 13.5 inches of snow per year.

Metric	Lake St. Louis, MO
Average High — January	39.3°F
Average High — July	87.5°F
Annual Precipitation	44.4"
Annual Snowfall	13.5"

Demographics

Metric	Lake St. Louis, MO	National Avg
Population	17,088	—
Median Age	43.5	38.9
Unemployment Rate	3.8%	3.7%
Avg Commute Time	25.7 min	26 min
White (non-Hispanic)	87.6%	59.3%
Black or African American	4.4%	13.6%
Hispanic or Latino	4.2%	18.9%
Asian	1.6%	6.3%
Under 18	19.8%	22.2%
65 and over	20.4%	16.8%

Nearby Cities

Josephville, MO 4 mi O'Fallon, MO 4 mi Dardenne Prairie, MO 5 mi Wentzville, MO 5 mi St. Paul, MO 5 mi

ZIP Codes in Lake St. Louis

Lake St. Louis, MO is covered by 1 ZIP code:

63367

Lake St. Louis vs Other Cities

Lake St. Louis, MO vs Josephville, MO Lake St. Louis, MO vs O'Fallon, MO Lake St. Louis, MO vs Dardenne Prairie, MO Lake St. Louis, MO vs Wentzville, MO Lake St. Louis, MO vs St. Paul, MO

Frequently Asked Questions

Is Lake St. Louis, MO affordable or expensive?

Lake St. Louis's cost of living index is 96, where 100 is the national average. That makes Lake St. Louis roughly 4% less expensive than a typical US city — a meaningful affordability advantage. The median home price is $357,600 and median rent is $1,404/month.

What is the crime rate in Lake St. Louis, MO?

Lake St. Louis's violent crime rate is 56.9 per 100,000 residents — the national average is ~380 per 100,000. Property crime is 605.2 per 100,000 (national avg ~2,100). Data from the FBI Uniform Crime Reporting Program.

What are the schools like in Lake St. Louis?

Public schools in Lake St. Louis are operated by WENTZVILLE R-IV. The district has 12 elementary, 4 middle, and 4 high schools. The student-to-teacher ratio is 13.9:1. 49.7% of adults 25+ hold a bachelor's degree or higher.

Is Lake St. Louis, MO a good place to live?

Lake St. Louis, MO has a population of 17,088, a median household income of $114,230, and an unemployment rate of 3.8%. Whether it's right for you depends on your priorities — use the compare tool above to stack it against another city you're considering.

What is the weather like in Lake St. Louis?

Lake St. Louis averages 39.3°F in January and 87.5°F in July. Annual rainfall is 44.4 inches with about 13.5 inches of snow per year. Based on NOAA 30-year climate normals (1991–2020).

What ZIP codes are in Lake St. Louis?

Lake St. Louis, MO is covered by 1 ZIP code: 63367.

What is the population of Lake St. Louis?

The population of Lake St. Louis, Missouri is 17,088 with a median age of 43.5. Source: US Census ACS 5-Year Estimates.

What are the pros and cons of living in Lake St. Louis?

Key numbers for living in Lake St. Louis: cost of living index 96 (100 = US average), median home $357,600, median household income $114,230, crime index 21 (100 = US average, lower is safer), schools rated A. Whether these are benefits or drawbacks depends on where you're coming from — compare Lake St. Louis side by side with your current city to see the trade-offs.