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CITY

Lake St. Louis

Missouri · 19,129 residents (2025 est.) · 8.54 sq mi
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The short version

Lake St. Louis is significantly wealthier than the US average, with a median household income of $125,693. The city has grown rapidly, with population up 78% since 2000. 52% of adults hold a bachelor's degree or higher, well above the national rate of 36%. Median home value has more than doubled since 2000, reaching $405,900. Poverty is rare here, at 4.3% of residents. It ranks in the top 5% of US cities for household income.

At a glance
Wealthier
above the US median
US median: $82,259
Older
median age 42.7
US median: 38.9
More educated
52% hold a bachelor's degree
US average: 36%
Less affordable
home values up 35%, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
18,066
+78%since 2000
from 10,169 in 2000
2000 – 2025
Population density
2,115 / sq mi
+78%since 2000
from 1,191 / sq mi in 2000
US average: 281
Median age
42.7
+6%since 2000
from 40.3 in 2000
US average: 38.9

PEP 2025 EST:19,129 residents (Census Bureau Vintage 2025, released March 2026)

Population, 2000 – 2024
9K12K14K16K19K2000201020202024Lake St. Louis
202418K
2000201020202024
Section 02

Income & economy

Median household income
$125,693
Unchangedinflation adjusted, since 2000
from $68,830 in 2000
US average: $82,259
2000 – 2024
Per capita income
$62,954
+96%since 2000
from $32,064 in 2000
US average: $44,673
Households earning $100K+
66.6%
+13.5 ptssince 2009
from 53.1% in 2009
US average: 53.3%
Poverty rate
4.3%
+0.5 ptssince 2000
from 3.9% in 2000
US average: 12.5%
Income inequality (Gini)
0.424
+5%since 2010
from 0.404 in 2010
US average: 0.476
Workforce by industry, 2024
Information13.3%
US avg: 10.8%
Other services13.1%
US avg: 6.7%
Public administration10.6%
US avg: 4.8%
Retail trade8.1%
US avg: 9.9%
Wholesale trade7.1%
US avg: 6.9%
Transportation & warehousing2.7%
US avg: 2.2%
Finance & insurance2.1%
US avg: 5.9%
Professional, scientific, technical1.8%
US avg: 5.1%
Arts, entertainment, food1.7%
US avg: 1.9%
Agriculture, forestry, fishing1%
US avg: 1.6%
Construction1%
US avg: 1.2%
Education & health services0.3%
US avg: 0.9%
Manufacturing0%
US avg: 0.4%
BARS: THIS PLACE · TICKS: US AVERAGE
Section 03

Housing

Median home value
$405,900
+35%inflation adjusted, since 2000
from $164,600 in 2000
US average: $376,019
2000 – 2024
Median gross rent
$1,588
+42%inflation adjusted, since 2000
from $616 in 2000
US average: $1,442
Owner-occupied
75.6%
−5.0 ptssince 2000
from 80.6% in 2000
24.4% rent
Vacancy rate
4.0%
−3.4 ptssince 2009
from 7.4% in 2009
US average: 10.0%
Owner cost-burdened
18.4%
−7.6 ptssince 2009
from 26.0% in 2009
US average: 22.9%
Renter cost-burdened
29.7%
+3.6 ptssince 2009
from 26.1% in 2009
US average: 47.4%
Afford Score
3.2
+35%since 2000
from 2.4 in 2000
2000 – 2024
Gentrification Score
59
RELATED:See current rent listings in Lake St. Louis on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic94.8%(9,641)
Black1.8%(183)
Hispanic / Latino1.3%(137)
Asian1%(99)
Other0%
Diversity Score10.1%(1,029)
2024
White, non-Hispanic84.7%(15,303)
Black5.5%(985)
Hispanic / Latino2.5%(453)
Asian1.9%(343)
Other5.4%(982)
Diversity Score34.4%(6,223)
Diversity Score
34
+240%since 2000
from 10 in 2000
2000 – 2024
Section 05

Education

Bachelor's degree or higher
51.7%
+14.0 ptssince 2000
from 37.7% in 2000
US average: 35.6%
High school or higher
97.0%
+2.6 ptssince 2000
from 94.4% in 2000
US average: 89.6%
Graduate degree
17.6%
+2.8 ptssince 2000
from 14.7% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
25.6 min
+35%since 2000
from 19.0 min in 2000
US average: 26.5
Drive alone to work
71.3%
−13.1 ptssince 2009
from 84.4% in 2009
US average: 68.9%
Carpooled to work
6.1%
−2.2 ptssince 2009
from 8.2% in 2009
US average: 8.5%
Public transit
0.0%
−0.2 ptssince 2009
from 0.2% in 2009
US average: 3.2%
Worked from home
21.9%
+16.1 ptssince 2009
from 5.8% in 2009
US average: 15.0%
Walked to work
0.5%
+0.2 ptssince 2009
from 0.3% in 2009
US average: 2.4%
Biked to work
0.0%
Unchangedsince 2009
from 0.0% in 2009
US average: 0.4%
No vehicle available
2.1%
+0.6 ptssince 2009
from 1.5% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
4.7%
−2.1 ptssince 2011
from 6.9% in 2011
US average: 5.2%
Labor force participation
66.4%
−3.6 ptssince 2011
from 70.0% in 2011
US average: 63.5%
Self-employed
7.9%
+0.9 ptssince 2009
from 7.0% in 2009
US average: 13.1%
Management & professional
49.9%
−20.2 ptssince 2009
from 70.1% in 2009
US average: 42.5%
Section 08

People & community

Male
50.5%
+0.9 ptssince 2009
from 49.7% in 2009
Female
49.5%
−0.9 ptssince 2009
from 50.3% in 2009
Foreign born
4.0%
+0.1 ptssince 2009
from 3.9% in 2009
US average: 14.1%
Veterans
8.7%
−41.6 ptssince 2009
from 50.3% in 2009
US average: 6.2%
With a disability
10.8%
+1.1 ptssince 2012
from 9.7% in 2012
US average: 13.3%
Uninsured
3.5%
−88.0 ptssince 2013
from 91.5% in 2013
US average: 8.4%
Broadband at home
98.3%
+9.0 ptssince 2017
from 89.3% in 2017
US average: 91.0%
English only at home
95.4%
+1.2 ptssince 2016
from 94.3% in 2016
US average: 77.7%
Spanish at home
1.4%
−1.3 ptssince 2016
from 2.6% in 2016
US average: 13.6%
Drill deeper

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Compare Lake St. Louis to nearby cities

LAKE ST. LOUIS VS
O'Fallon
Income$110,443−12%
Home value$326,200−20%
Population96,101+402%
SEE FULL COMPARISON →
LAKE ST. LOUIS VS
Dardenne Prairie
Income$152,500+21%
Home value$432,000+6%
Population15,032−21%
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LAKE ST. LOUIS VS
Wentzville
Income$112,394−11%
Home value$331,300−18%
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LAKE ST. LOUIS VS
St. Peters
Income$91,637−27%
Home value$269,900−34%
Population61,479+221%
SEE FULL COMPARISON →
Frequently asked

How many people live in Lake St. Louis, Missouri?

Lake St. Louis, Missouri has about 18,066 residents according to the 2024 American Community Survey.

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

The typical household in Lake St. Louis, Missouri earns about $125,693 a year. Half of households make more than that, and half make less.

Is Lake St. Louis, Missouri expensive?

In Lake St. Louis, Missouri, the median home is worth about $405,900, and the typical rent is about $1,588 a month.

How educated are people in Lake St. Louis, Missouri?

About 51.7% of adults age 25 and over in Lake St. Louis, Missouri hold a bachelor's degree or higher.

What is the poverty rate in Lake St. Louis, Missouri?

About 4.3% of people in Lake St. Louis, Missouri live below the federal poverty line.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →

Lake St. Louis, Missouri: demographics, income & housing data · CensusEasy