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Lake St. Louis, MO

Missouri

Lake St. Louis is a small city in Missouri with a population of 17,538. Residents earn $123,427 per year, which is 64% above the national average.

4.0 /5.0
A Great
17,538 Population 2,051/sq mi density
$123,427 Median Income $60,780 per capita
$375,300 Home Value
$1,608 Median Rent 21.5% income on rent
55°F Avg Temperature 267 sunny days/yr
94 Violent Crime/100K 2,028 property/100K
A
Overall
4.0 / 5.0
Great overall score based on economy, affordability, safety and education
A+
Economy
4.9 / 5.0
$123,427 median income, 3.0% unemployment
A+
Affordability
5.0 / 5.0
$375,300 home value, $1,608/mo rent
F
Safety
1.0 / 5.0
94 violent crimes/100K (75% below avg)
A+
Education
5.0 / 5.0
49.5% bachelor's degree or higher
Median Income $123,427
64% higher than US avg
Home Value $375,300
33% higher than US avg
Violent Crime 94/100K
75% lower than US avg
Bachelor's+ 49.5%
47% higher than US avg
Median Rent $1,608
38% higher than US avg
Obesity Rate 34.7%
8% higher than US avg
Unemployment 3.0%
17% lower than US avg
Poverty Rate 4.4%
65% lower than US avg

How Lake St. Louis Compares to the U.S. Average (100% = U.S. avg)

People

Population17,538
Median Age43.2 yrs
Density2,051/mi²
Male / Female50% / 50%
Largest GroupWhite 88%
Veterans9.1%

Economy

A+
Median Income$123,427
Per Capita$60,780
Unemployment3.0%
Poverty4.4%
Commute27 min

Housing

A+
Home Value$375,300
Rent$1,608
OwnershipN/A
Housing Units7,071
Rent Burden21.5%

Crime

F
Violent94/100K
Property2,028/100K
Murder0.0/100K
Assault81/100K
Burglary134/100K

Health

Obesity34.7%
Uninsured6.0%
Smoking11.4%
Depression23.5%
Heart Disease4.5%

Climate

Avg Temp55°F (13°C)
AQI41 (Good)
Rain37.8 in/yr
Sunny Days267/yr
Elevation577 ft (176 m)

Education

A+
Bachelor's+49.5%
High School+97.2%
Graduate+17.0%
School Score5.51

Community

2024 VoteR 77% / D 22%
Commute27 min
Broadband96.5%
EV Stations1

Is Lake St. Louis a Good Place to Live?

Based on current data, Lake St. Louis receives an overall livability score of 4.0 out of 5.0, earning a grade of A. Key strengths include above-average household incomes, low unemployment, low crime rates, a highly educated population. Lake St. Louis stands out as an excellent place to live, with strong marks across most quality-of-life indicators.

Economy & Jobs

The median household income in Lake St. Louis is $123,427, which is significantly higher than the national average — 64% above $75,149. This places Lake St. Louis among higher-income communities. Unemployment stands at 3.0%, indicating a healthy job market. Only 4.4% of residents live below the poverty line, well below the national rate of 12.4%. Workers commute an average of 27 minutes.

Cost of Living & Housing

The median home value in Lake St. Louis is $375,300, 33% above the national median. Renters pay a median of $1,608 per month, significantly above the national average of $1,163. At just 3x median income, home prices are very affordable relative to local earnings.

Safety & Crime

Lake St. Louis is a very safe community with a violent crime rate of 94 per 100,000 residents — well below the national average of 380. Property crime occurs at a rate of 2,028 per 100,000, near the national average.

Education

Educational attainment is solid, with 49.5% holding a bachelor's degree or higher, near the national average. 97.2% have completed high school. Area schools have an average test score of 5.5/10.

Climate & Weather

Lake St. Louis experiences four distinct seasons with an average temperature of 55°F. Winters average 29°F in January while summers reach 78°F in July. With 267 sunny days per year, residents enjoy well above the national average of sunshine. Annual precipitation totals 37.8 inches, including 6.5 inches of snow. Air quality is rated Good with a median AQI of 41.

Lake St. Louis has a population of 17,538 with a density of 2,051 people per square mile, spread across 8.6 square miles. The median age is 43.2 years, 11% older than the national median of 38.9. The gender split is 50.4% female and 49.6% male. The city is predominantly White (87.6%), with 1.1% Hispanic, 4.2% Black. English is the primary language spoken at home by 94.3% of residents, while 5.7% speak Spanish. 9.1% of the population are veterans, above the national rate of 6.0%. 12.8% of residents have a disability. 97.0% have health insurance coverage.

Population

17,538
Total Population
2,051
People / sq mi
43.2yrs
Median Age
11% above US avg
8.6mi²
Land Area

Gender Distribution

Male 49.6%
Female 50.4%

Race & Ethnicity

Lake St. Louis vs U.S. Average

Language Spoken at Home

English Only94.3%
20% above US avg
Spanish5.7%
57% below US avg

Social Characteristics

Lake St. Louis vs U.S. Average

The median household income in Lake St. Louis is $123,427, which is 64% above the national average of $75,149. Per capita income is $60,780 (above the $39,052 national figure). The unemployment rate is 3.0% (below the 3.6% US average). 4.4% of residents live below the poverty line, lower than the national rate of 12.4%. The cost of living index is 90.8, below the national baseline of 100 — offering relatively affordable living. Workers commute an average of 27 minutes. 18.3% of workers work from home.

Income: Lake St. Louis vs U.S.

Commute Mode

Income

Median HH Income$123,427
64% above US avg
Per Capita Income$60,780

Employment & Poverty

Unemployment3.0%
17% below US avg
Poverty Rate4.4%
65% below US avg

Business (County)

Tax & Cost of Living

Cost of Living90.80 (100=avg)

Commute & Transportation

Commute Time26.8 min
Drive Alone75.3%
Public Transit0.0%
Work from Home18.3%

Walkability

The median home value in Lake St. Louis is $375,300, 33% above the national median of $281,900. Homes sell for 97% of their list price. Monthly rent averages $1,608 (38% above the national average of $1,163). Fair market rent ranges from $775 for a one-bedroom to $970 for a two-bedroom apartment. There are 7,071 total housing units in the city. The median year a home was built is 1996. 21.5% of renters spend 30% or more of their income on housing. The home price-to-income ratio is 3x, well within the affordable range.

Home Value Sources

Ownership Split

Home Values

Census Median$375,300
33% above US avg
Median List Price$419,900

Real Estate Market (Redfin)

Median List Price$419,900
$/Sq Ft$166
Homes Sold24
Sale-to-List Ratio97.0%
Price Drops31.2%
Inventory61

Rental Costs

Census Median Rent$1,608
38% above US avg
Rent Burden21.5%

HUD Fair Market Rent

Studio$732
1 Bedroom$775
2 Bedrooms$970
3 Bedrooms$1,265
4 Bedrooms$1,457

Ownership & Property

Owner-Occupied75.2%
Housing Units7,071
Median Year Built1996

Property Tax

In Lake St. Louis, 34.7% of adults are obese, above the national rate of 32.1%. 8.4% have diabetes (below the 10.5% national rate). Heart disease affects 4.5% of residents, below the national average. 27.7% have high blood pressure. 11.4% are current smokers. 20.5% report binge drinking. 20.7% are physically inactive, below the national average. 23.5% report depression (above the 20.0% national average). 15.7% experience frequent mental distress. 6.0% of residents lack health insurance (below the 8.6% national rate).

Health Metrics: Lake St. Louis vs U.S. Average (%)

Chronic Conditions

Obesity34.7%
8% above US avg
Diabetes8.4%
Heart Disease4.5%
High Blood Pressure27.7%
Asthma10.1%
COPD4.7%
Cancer7.7%
Stroke2.3%

Behaviors & Mental Health

Smoking11.4%
19% below US avg
Binge Drinking20.5%
Physical Inactivity20.7%
Depression23.5%
Mental Distress15.7%
Physical Distress10.7%
Short Sleep39.6%

Healthcare Access

Insurance Rate97.0%
Uninsured6.0%
30% below US avg
Checkup Rate76.4%
Dental Visits68.3%

Food & Exercise

Lake St. Louis has a violent crime rate of 94 per 100,000 residents, 75% below the national average of 380. This breaks down to aggravated assault at 80.6 per 100,000, robbery at 13.4, rape at 0.0. The murder rate is 0.0 per 100,000 (below the national rate of 6.3). Property crime stands at 2,028 per 100,000, 3% above the U.S. average. This includes larceny/theft at 1,874, burglary at 134, vehicle theft at 20 per 100,000 residents. Overall, Lake St. Louis receives a safety grade of F.

Crime Rates: Lake St. Louis vs U.S. Average (per 100,000)

Violent Crime

Total Violent94.0/100K
75% below US avg
Murder0.0/100K
100% below US avg
Rape0.0/100K
Robbery13.4/100K
Assault80.6/100K

Property Crime

Total Property2,028.5/100K
3% above US avg
Burglary134.3/100K
Theft1,874.0/100K
Vehicle Theft20.2/100K
Arson0.0/100K

Traffic Safety

Safety Score

Safety GradeF
Safety Score1.0 / 5.0
Lake St. Louis experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 29°F in January while summers reach 78°F in July. The area gets 267 sunny days per year, well above the U.S. average of 205 — making it one of the sunnier locations in the country. Annual precipitation totals 37.8 inches. The area receives 6.5 inches of snow annually. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 577 feet.

Temperature

29°F Jan (-2°C) 78°F Jul (26°C)
Annual Average54.7°F
1% above US avg
January Average29°F (-2°C)
July Average78°F (26°C)
Sunny Days267 days/yr

Precipitation & Snow

Annual Rainfall37.8 inches
1% below US avg
Snowfall6.5 inches/yr

Air Quality

AQI Median41.0
RatingGood

Geography

Elevation577 ft (176 m)
Area8.6 sq mi (22.1 km²)
Population Density2,051/sq mi
Coordinates38.7850°N, 90.7935°W
TimezoneAmerica/Chicago

Monthly Weather

Month Avg Temperature Precipitation Summary
January 29°F (-2°C) 1.8 in Coldest, Driest
February 34°F (1°C) 2.1 in
March 44°F (7°C) 3.4 in
April 55°F (13°C) 3.7 in
May 64°F (18°C) 4.3 in Wettest
June 73°F (23°C) 3.5 in
July 78°F (26°C) 3.9 in Warmest
August 76°F (24°C) 3.2 in
September 68°F (20°C) 3.2 in
October 57°F (14°C) 3.0 in
November 45°F (7°C) 3.2 in
December 34°F (1°C) 2.6 in

Lake St. Louis has a seasonal temperature swing of 49°F — from 29°F in January to 78°F in July. Total annual precipitation is 37.8 inches, with May being the wettest month (4.3") and January the driest (1.8").

49.5% of adults hold a bachelor's degree or higher, 47% above the national average of 33.7%. 97.2% have completed high school. 17.0% hold a graduate or professional degree (above the 13.1% national rate). Area schools have an average test score of 5.5 out of 10. In the 2024 presidential election, the county voted Republican with 76.6% of the vote, a 54.2-point margin. 96.5% of households have broadband internet access. The area has 1 EV charging stations. 75.3% of workers drive alone to work.

2024 Presidential Election (County)

R 76.6%
D 22.4%

Winner: Republican by 54.2 points

Education

Bachelor's Degree+49.5%
47% above US avg
High School+97.2%
Graduate Degree+17.0%
School Test Score5.51
A+ Education Grade (5.0/5.0)

Urban-Rural Classification

Population Density2,051/sq mi
Total Area8.6 sq mi

Infrastructure & Services

Broadband Access96.5%
EV Charging Stations1
Alt Fuel Stations1

Safety & Disasters

F Safety Grade (1.0/5.0)

Commute & Transportation

Avg Commute26.8 min
Drive Alone75.3%
Public Transit0.0%
Work from Home18.3%

Frequently Asked Questions About Lake St. Louis

What is the population of Lake St. Louis?

Lake St. Louis has a population of 17,538 residents and is located in Missouri. The population density is 2,051 people per square mile, spread across 8.6 square miles. The median age of residents is 43.2 years, which is older than the national median of 38.9 years. The population is 50.4% female and 49.6% male.

Is Lake St. Louis expensive to live in?

Lake St. Louis is more affordable than the national average, with a cost of living index of 90.8 — below the baseline of 100. The median household income is $123,427, 64% above the national average of $75,149. The median home value is $375,300 (33% above the U.S. median). Renters pay a median of $1,608 per month, above the national average of $1,163. The home price-to-income ratio is 3x, indicating housing is reasonably affordable relative to local income levels.

Is Lake St. Louis safe?

Lake St. Louis is considered a very safe city with a violent crime rate of 94 per 100,000 residents, well below the national average of 380. Property crime occurs at a rate of 2,028 per 100,000 (above the national average). Overall, Lake St. Louis receives a safety grade of F based on combined crime data.

What is the weather like in Lake St. Louis?

Lake St. Louis has a four-season climate with an average annual temperature of 55°F (13°C). Winter temperatures average 29°F in January, while summers reach an average of 78°F in July. The area receives 267 sunny days per year, well above the national average of 205. Annual rainfall totals 37.8 inches, with 6.5 inches of snow. Air quality is rated Good with a median Air Quality Index (AQI) of 41.

How is the job market in Lake St. Louis?

Lake St. Louis has a healthy job market with an unemployment rate of 3.0%, near the national average of 3.6%. The average commute time is 27 minutes, and 18.3% of workers work from home.

How much does housing cost in Lake St. Louis?

The median home value in Lake St. Louis is $375,300. For renters, the median monthly rent is $1,608. Fair market rent is $775 for a 1-bedroom and $970 for a 2-bedroom apartment.

How are the schools in Lake St. Louis?

Schools in Lake St. Louis score 5.5 out of 10 on standardized testing, near the national average. 49.5% of adults in Lake St. Louis hold a bachelor's degree or higher, above the national average of 33.7%. 97.2% have completed high school. 17.0% hold a graduate or professional degree.

How healthy is Lake St. Louis?

The obesity rate in Lake St. Louis is 34.7% (above the national rate of 32.1%). 11.4% of adults are smokers. 20.7% are physically inactive. 23.5% of residents report depression. 6.0% lack health insurance (below the national rate).

What is transportation like in Lake St. Louis?

The average commute in Lake St. Louis is 27 minutes. 75.3% of workers drive alone to work, and 18.3% work from home.

What are the demographics of Lake St. Louis?

The racial and ethnic makeup of Lake St. Louis is 87.6% White, 4.2% Black or African American, 1.1% Hispanic or Latino. 94.3% of residents speak only English at home, while 5.7% speak Spanish. 9.1% of the population are military veterans. 12.8% of residents have a disability. 97.0% have health insurance coverage.

Nearby Cities

Dardenne Prairie, MO 13,137 pop · 3.6 mi Wentzville, MO 45,734 pop · 3.7 mi O'Fallon, MO 92,697 pop · 5.3 mi Weldon Spring, MO 5,291 pop · 7.5 mi Cottleville, MO 5,750 pop · 8.0 mi Wright City, MO 5,025 pop · 12.6 mi Moscow Mills, MO 3,647 pop · 13.1 mi Chesterfield, MO 49,591 pop · 14.4 mi Winfield, MO 1,726 pop · 15.0 mi Wildwood, MO 35,168 pop · 15.6 mi Clarkson Valley, MO 2,592 pop · 15.8 mi Troy, MO 13,467 pop · 16.8 mi Ellisville, MO 9,908 pop · 17.3 mi Marthasville, MO 2,587 pop · 17.9 mi
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