Cost of living in Lake St. Louis, Missouri
Lake St. Louis, Missouri has about 18,066 people. Typical rent is $1,588 a month, including utilities, and a typical household earns $125,693 a year. Both figures are Census 2020–2024 medians, not a listing or your pay. This site does not approve or deny benefits. A missing figure stays blank. We do not guess it.
Ranked #65 in Missouri on the 2026 Most Affordable Towns Index.
Simple answer
Typical rent is $1,588 a month.
Lake St. Louis is a city in Missouri. That rent number includes utilities. A typical household earns $125,693 a year.
- People
- 18,066
- Census average, 2020–2024
- Typical rent
- $1,588
- Median gross rent, includes utilities
- Typical pay
- $125,693
- Median household income, yearly
- Typical home
- $405,900
- Median home value
- 2-bedroom fair rent
- $1,349
- St. Louis, MO-IL HUD Metro FMR Area
- Gas
- $4.237
- Midwest (PADD 2), week of October 12, 2026
Lake St. Louis, Missouri has about 18,066 people. That count is a 2020–2024 Census average, not a headcount from one day.
A typical home is worth about $405,900.
HUD's fair-market rent for a 2-bedroom in St. Charles County is $1,349 a month. That is the county number, not an apartment listing in Lake St. Louis. It runs from October 2026 through September 2027.
In the St. Louis, MO-IL metro area, prices sit at 95.1 when the U.S. average is 100. That is a 2024 BEA index.
Missouri taxes wages. A typical combined sales tax is 8.4% as of January 1, 2026. That mix is statewide, not Lake St. Louis's exact store tax.
Some places in Missouri add a local wage tax. In 2023 the state average was about 0.18% of income. That is not a Lake St. Louis bill.
In July 2026, a typical Missouri home paid 16.09¢ per kilowatt-hour. That is a state average from EIA, not Lake St. Louis's bill.
EIA does not publish a Missouri gasoline price. For the week of October 12, 2026, the Midwest (PADD 2) all-grades price was $4.237 a gallon. At 12,000 miles a year and 25 mpg, the index counts that as $2,033.76 a year. Those miles are our standard, not a Census figure, and every town in Missouri shares this price.
Among 350 places we list in Missouri with a rent figure, 17 have higher typical rent than Lake St. Louis.
Nearby places
- O'Fallon
Typical rent $1,443
Compare with Lake St. Louis - Dardenne Prairie
Typical rent $1,444
Compare with Lake St. Louis - Wentzville
Typical rent $1,345
Compare with Lake St. Louis - St. Paul
Typical rent $975
Compare with Lake St. Louis - Cottleville
Typical rent $1,624
Compare with Lake St. Louis - Weldon Spring
Typical rent $2,800
Compare with Lake St. Louis - Foristell
Typical rent $883
Compare with Lake St. Louis - St. Peters
Typical rent $1,321
EBT nearby
USDA has a live map of stores that take SNAP. We did not copy that store list here. The downloadable file is a history file for 2005 through 2025, so the live map is the one to use.
Locator page updated 2026-09-11. Last checked 2026-10-16.
Food stamps (SNAP) tools in Missouri
Bigger places in Missouri
Census 2020-2024. HUD rents for October 2026–September 2027. BEA prices for 2024. Taxes as of January 1, 2026. Checked 2026-10-16. 15,000 places are in this guide.