Lake St. Louis, MO
Population 17,538 · Missouri
About Lake St. Louis, MO
Lake St. Louis is a mid-sized city in Missouri with a population of 17,538 residents. The median household income is $123,427 per year, which is above the national average. The median age in Lake St. Louis is 43.2 years.
Housing in Lake St. Louis has a median home value of $375,300 and median monthly rent of $1,608. Of the 7,495 total housing units, the majority are owner-occupied, with 5,401 owner-occupied and 1,778 renter-occupied units.
The unemployment rate in Lake St. Louis is 4.5% and the poverty rate is 4.1%. 49.5% of residents hold a bachelor's degree or higher. The average commute time is 26.8 minutes.
How Lake St. Louis Ranks in Missouri
Cost of Living in Lake St. Louis, MO
Compared to national averages, Lake St. Louis has a median household income of $123,427 (64% above the national median of $75,149). Home values average $375,300, which is 53% above the national median. Monthly rent at $1,608 is 38% above the US average of $1,163. Within Missouri, Lake St. Louis's income is 102% above the state average of $61,047, and home values are 149% above the state median of $150,786.
Why Live in Lake St. Louis, MO?
Lake St. Louis offers a strong local economy with a median household income of $123,427, well above the national average, and a well-educated community where 49.5% of residents hold a bachelor’s degree or higher, and a low poverty rate of 4.1%, better than the national average.
Potential considerations include a competitive housing market where the typical home costs $375,300. However, Lake St. Louis’s smaller community size offers a quieter lifestyle and tight-knit neighborhoods.
Lake St. Louis has a population of 17,538 with a median age of 43.2 years. Compare Lake St. Louis with other cities to see how it stacks up, or explore all cities in Missouri.
Similar Cities Near Lake St. Louis
Cities in Missouri with a similar population size.
| City | Population | Median Income | Home Value | |
|---|---|---|---|---|
| Kirksville | 17,493 | $48,063 | $145,300 | Compare |
| Clayton | 17,282 | $128,898 | $799,200 | Compare |
| Farmington | 17,999 | $49,882 | $187,500 | Compare |
| Concord | 18,028 | $84,389 | $279,400 | Compare |
| Spanish Lake | 18,183 | $51,125 | $121,300 | Compare |
| Manchester | 18,189 | $92,839 | $298,400 | Compare |
| Hannibal | 16,825 | $54,071 | $126,300 | Compare |
| Ferguson | 18,350 | $46,106 | $99,300 | Compare |
Demographics
Racial & Ethnic Composition
Economy & Education
Housing
Other Cities in Missouri
Data source: US Census Bureau ACS 5-Year Estimates. Last updated: 2026-04-05.
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Frequently Asked Questions about Lake St. Louis
What is the population of Lake St. Louis, MO?
The population of Lake St. Louis, MO is 17,538 according to the latest Census data.
What is the median household income in Lake St. Louis?
The median household income in Lake St. Louis, MO is $123,427 per year.
What is the median home value in Lake St. Louis?
The median home value in Lake St. Louis, MO is $375,300.
What is the average rent in Lake St. Louis?
The median monthly rent in Lake St. Louis, MO is $1,608.
What is the unemployment rate in Lake St. Louis?
The unemployment rate in Lake St. Louis, MO is 4.5%.