Lake Saint Louis, MO demographics:
population, income, and more

Total population
29,709
6.6% year-over-year change
Median household income
$137,648/yr
2.0% year-over-year change
Housing units
11,580
6.5% year-over-year change

Lake Saint Louis population

How many people live in Lake Saint Louis

Lake Saint Louis is home to 29,709 residents, according to the most recent Census data. Gender-wise, 49.8% of Lake Saint Louis locals are male, and 50.2% are female.

Total population
29,709
6.6% year-over-year change
Gender ratio
Male
49.8%
14,807
Female
50.2%
14,902
Value Percent YoY change
Male 14,807 49.8% 7.3%
Female 14,902 50.2% 5.8%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Lake Saint Louis is 40, with the population distributed as follows: about 19.2% are children under 15, then 13.8% are in the 15 to 24 age group. Adults between 25 and 44 make up 26.1% of the population, while another 24.8% fall into the 45 to 64 bracket. Finally, around 16% are 65 or older.

Median age
39.5
Age breakdown
Under 15
19.2%
15 to 24
13.8%
25 to 44
26.1%
45 to 64
24.8%
Over 65
16%
Value Percent YoY change
Under 15 5,705 19.2% 8.4%
15 to 24 4,109 13.8% 8.8%
25 to 44 7,766 26.1% 7.6%
45 to 64 7,373 24.8% 2.7%
Over 65 4,756 16% 7.2%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Lake Saint Louis, 95.1% of the population are US-born citizens, while 3% have gained naturalized citizenship. At the same time, 1.9% of residents are non-citizens. As for race, 83.9% of locals are Caucasian, 5.6% are African American and 2.5% have Asian roots. There’s also a share of 6.3% that includes residents with two or more races.

Citizenship
U.S.-born citizens
95.1%
Non-U.S.-born citizens
3%
Non-citizens
1.9%
Value Percent YoY change
U.S.-born citizens 28,267 95.1% 5.7%
Non-U.S.-born citizens 888 3% 10.0%
Non-citizens 555 1.9% 67.2%
Racial breakdown
White
83.9%
Black or African American
5.6%
American Indian and Alaska Native
0.1%
Asian
2.5%
Native Hawaiian and other Pacific Islander
0%
Two or more races
6.3%
Other
1.5%
Value Percent
White 24,940 83.9%
Black or African American 1,667 5.6%
American Indian and Alaska Native 29 0.1%
Asian 745 2.5%
Two or more races 1,876 6.3%
Other 453 1.5%

Households in Lake Saint Louis

A peek inside Lake Saint Louis households

Lake Saint Louis has 11,119 households, with an average of 3 members in each. Of these, 75.8% are families, while the remaining 24.2% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
11,119
5.7% year-over-year change
Average people per household
3
Non-family households
2,692
Family households
8,428
Value Percent YoY change
Non-family households 2,692 24.2% 6.1%
Family households 8,428 75.8% 5.5%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Lake Saint Louis

The housing landscape of Lake Saint Louis

Lake Saint Louis's housing consists of 11,580 units, with 74.5% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 10.1% and offer a more compact, shared living style.

Housing units
11,580
6.5% year-over-year change
Housing types
Value Percent
1 unit, detached 8,627 74.5%
1 unit, attached 1,167 10.1%
2 units 17 0.2%
3 or 4 units 262 2.3%
5 to 9 units 662 5.7%
10 to 19 units 363 3.1%
20 to 49 units 413 3.6%
50 or more units 69 0.6%
Homes built since 2020
1,183
59.4% year-over-year change

The age of buildings in Lake Saint Louis

In Lake Saint Louis, the median construction year is 2005. Most development happened in the second half of the 20th century. Then, 29.7% of homes were added from 2000 to 2009, 24.1% between 2010 and 2019, and 10.2% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 4 0% -55.6%
Built between 1940 and 1949 45 0.4% 4.7%
Built between 1950 and 1959 21 0.2% 40.0%
Built between 1960 and 1969 461 4% 21.0%
Built between 1970 and 1979 1,237 10.7% 4.3%
Built between 1980 and 1989 1,224 10.6% 3.4%
Built between 1990 and 1999 1,183 10.2% -15.7%
Built between 2000 and 2009 3,434 29.7% 4.8%
Built between 2010 and 2019 2,787 24.1% 5.6%
Built in 2020 or later 1,183 10.2% 59.4%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Lake Saint Louis occupancy rates

Out of the 11,119 occupied housing units in Lake Saint Louis, 81.5% are owner-occupied, while 18.5% are lived in by tenants. Meanwhile, 4% of all homes on the local market sit vacant.

Occupied housing units
11,119
5.7% year-over-year change
Occupancy breakdown
Renter occupied
2,058
Owner occupied
9,061
Value Percent YoY
change
Renter occupied 2,058 18.5% 2.8%
Owner occupied 9,061 81.5% 6.3%
Unoccupied housing units
4.0%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Lake Saint Louis housing costs

Housing costs in Lake Saint Louis come to a median of $1,831 per month, while tenants specifically pay a median gross rent of $1,634.

Median housing costs per month
$1,831/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Lake Saint Louis
$1,634/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Lake Saint Louis

Lake Saint Louis education at a glance

About 20.7% of the population in Lake Saint Louis went to high school, while 22.4% pursued college studies. Another 8.8% earned an associate degree and 31.2% hold a bachelor’s. Meanwhile, 16.7% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 62 0.3% -17.3%
High school diploma 4,621 20.7% 0.6%
College diploma 4,998 22.4% 4.5%
Associate degree 1,966 8.8% -6.2%
Bachelor's degree 6,984 31.2% 11.7%
Graduate degree 3,736 16.7% 14.8%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Lake Saint Louis

How much people earn in Lake Saint Louis

The average annual household income in Lake Saint Louis was $158,445 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +4% change from the previous year. At the same time, the median income stood at $137,648, reflecting a +2% shift over the same period.

Average household income in Lake Saint Louis
$158,445/year
4.0% year-over-year change
Median household income in Lake Saint Louis
$137,648/year
2.0% year-over-year change

Lake Saint Louis income by age

In Lake Saint Louis, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $165,932. Those with someone between 45 and 64 in charge, often well established professionally, earn $148,093 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $58,989, while those led by someone over 65, many of whom may be retired, have about $80,211 in earnings. Overall, 96.8% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $58,989 9.0%
25 - 44 $165,932 2.6%
45 - 64 $148,093 1.9%
Over 65 $80,211 2.6%
Above poverty level
28,530
Below poverty level
951
Value Percent YoY
change
Above poverty level 28,530 96.8% 6.2%
Below poverty level 951 3.2% 18.7%

Employment in Lake Saint Louis

Workforce and job types in Lake Saint Louis

85.2% of the working population are employed in professional or administrative positions, while 14.8% are in hands-on or service-based jobs. Also, 8.6% run their own businesses, 74% are employed by private companies, and 8.6% work in the public sector.

Workforce demographics

White collar
13,841
Blue collar
2,406
Value Percent YoY change
White collar 13,841 85.2% 6.5%
Blue collar 2,406 14.8% 3.0%
Employer type
Self employees
8.6%
Private companies
74%
Governmental workers
8.6%
Not for profit companies
8.7%
Value Percent YoY change
Self employees 1,392 8.6% 18.7%
Private companies 12,029 74% 4.9%
Governmental workers 1,406 8.6% 5.7%
Not for profit companies 1,419 8.7% 4.7%

Transportation in Lake Saint Louis

How people get around in Lake Saint Louis

In Lake Saint Louis, the average commute time is 26 minutes. Commuting methods vary: 99.5% of residents travel by personal vehicle and 0.5% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
26 min
Means of transportation
Value Percent YoY change
Car 11,962 99.5% 2.4%
Taxicab 6 0% N/A
Walk 56 0.5% 300.0%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Lake Saint Louis by zipcode?

Zipcode Population Number of households Median income Average income
63367 29,725 11,125 $137,648 $158,577

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FAQs about Lake Saint Louis demographics 

What is the total population of Lake Saint Louis?

Lake Saint Louis has a total population of 29,709 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +6.6% compared to a year ago.

What is the gender ratio in Lake Saint Louis?

The gender ratio in Lake Saint Louis is as follows:
  • 49.8% males (14,807 residents)
  • 50.2% females (14,902 residents)

What is the median age in Lake Saint Louis?

The median age in Lake Saint Louis is 39.5.

What is the age distribution of the population in Lake Saint Louis?

The age distribution in Lake Saint Louis is as follows:
  • Under 15: 19.2% (5,705 residents)
  • Ages 15-24: 13.8% (4,109 residents)
  • Ages 25-44: 26.1% (7,766 residents)
  • Ages 45-64: 24.8% (7,373 residents)
  • Over 65: 16% (4,756 residents)

What is the racial and ethnic makeup of Lake Saint Louis?

The racial and ethnic makeup of Lake Saint Louis is as follows:
  • White: 83.9% (24,940 residents)
  • Black or African American: 5.6% (1,667 residents)
  • American Indian and Alaska Native: 0.1% (29 residents)
  • Asian: 2.5% (745 residents)
  • Native Hawaiian and Other Pacific Islander: 0% ( residents)
  • Two or More Races: 6.3% (1,876 residents)
  • Other: 1.5% (453 residents)

What percentage of the population in Lake Saint Louis are U.S.-born citizens?

U.S.-born citizens represent 95.1% of the population in Lake Saint Louis.

How many housing units are there in Lake Saint Louis?

There are 11,580 housing units in Lake Saint Louis, reflecting a +6.5% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Lake Saint Louis and what is the average household size?

Lake Saint Louis has a total of 11,119 households, with an average of 3 people in each.

What is the median household income in Lake Saint Louis?

Lake Saint Louis has a median household income of $137,648, representing a +2.0% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for Lake Saint Louis?

Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 85.2% (13,841 residents)
  • Blue-collar workers: 14.8% (2,406 residents)

Places of employment:
  • Self-employed: 8.6% (1,392 residents)
  • Private companies: 74% (12,029 residents)
  • Governmental workers: 8.6% (1,406 residents)
  • Not-for-profit companies: 8.7% (1,419 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025