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

Name: Income and affordability in Lake St. Louis, MO, 2020–2024
Creator: US Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

The median household income in Lake St. Louis, MO is $125,693 (±$12,310) a year (2020–2024 American Community Survey).

Paying the median gross rent of $1,588 a month would take about $63,500 a year at the common guideline of spending no more than 30% of income on rent.

In Lake St. Louis, the median household income went from $92,298 in 2015–2019 to $125,693 in 2020–2024 (+36.2%).

Prices (CPI-U) rose 22.7% over the same years; the change is not measurably different from the rise in prices.

Figures last updated on November 12, 2026.

Median household income: $125,693 (±$12,310)
Median renter income: $69,328 (±$15,121)
Income to afford median rent: about $63,500

Income in Lake St. Louis against St. Charles County, its state and the nation

Income, estimate (90% margin of error)
	Lake St. Louis	St. Charles County	Missouri	United States
Median household income	$125,693 (±$12,310)	$104,692 (±$1,179)	$70,702 (±$325)	$80,734
Median renter household income	$69,328 (±$15,121)	$60,104 (±$2,204)	$43,288 (±$509)	$52,966
Median owner household income	$150,943 (±$12,109)	$118,741 (±$1,953)	$87,780 (±$425)	$100,009
Median gross rent	$1,588 (±$138)	$1,370 (±$21)	$1,033 (±$6)	$1,413

In Lake St. Louis, median household income is higher than in St. Charles County ($104,692).

It is also higher than in Missouri ($70,702).

It is higher than the national figure ($80,734).

In St. Charles County, Lake St. Louis ranks 7 of 17 places with a published estimate, from highest to lowest median household income.

Statewide, it ranks 38 of 1,154.

Rankings use the estimates alone; where margins of error overlap, neighboring ranks may not truly differ.

How much you need to earn to rent in Lake St. Louis

Many landlords and housing programs use 30% of gross income as the most a household should spend on rent.

At that guideline, the median gross rent of $1,588 a month ($19,056 a year) needs an income of about $63,500 a year.

The median renting household in Lake St. Louis earns $69,328 a year.

This is arithmetic on the published medians, not a rule any landlord must follow; screening criteria vary and some places limit how income may be weighed.

Income against housing costs since 2015–2019

2015–2019 and 2020–2024 American Community Survey 5-year estimates
	2015–2019	2020–2024	Amount of change	Verdict
Median household income	$92,298 (±$5,779)	$125,693 (±$12,310)	+36.2%	No measurable change after inflation
Median gross rent	$1,130 (±$88)	$1,588 (±$138)	+40.5%	Up after inflation
Median home value	$274,400 (±$14,458)	$405,900 (±$24,017)	+47.9%	Up after inflation

The Census Bureau publishes 2015–2019 dollars in 2019 dollars and 2020–2024 dollars in 2024 dollars.

Prices (the CPI-U, US Bureau of Labor Statistics) rose 22.7% between 2019 and 2024, so a dollar figure’s verdict compares the two after raising the earlier one by that much, using the Census Bureau’s test for a difference.

The two periods do not overlap, as the Census Bureau recommends for 5-year estimates.

Median household income in places near Lake St. Louis

Nearest places with a published estimate, compared with Lake St. Louis
Place	Distance	Median household income	Compared with this place
Lake St. Louis	—	$125,693 (±$12,310)	—
Josephville	3.5 mi	$107,708 (±$65,400)	Not measurably different
O'Fallon	3.5 mi	$110,443 (±$5,849)	Lower
Dardenne Prairie	4.6 mi	$152,500 (±$19,964)	Higher
Wentzville	5.2 mi	$112,394 (±$6,343)	Not measurably different
St. Paul	5.3 mi	$159,022 (±$19,881)	Higher
New Melle	6.7 mi	$114,375 (±$35,122)	Not measurably different
Cottleville	7.2 mi	$131,310 (±$28,368)	Not measurably different
Flint Hill	7.3 mi	$130,208 (±$45,563)	Not measurably different

Nearby places with a measurably lower figure: O'Fallon, MO ($110,443).

Nearby places with a measurably higher figure: Dardenne Prairie, MO ($152,500), St. Paul, MO ($159,022).

Distance is measured in a straight line between the Census Bureau’s internal points for each place.

Median household income across St. Charles County, place by place

Rank	Place	Median household income
1	St. Paul	$159,022 (±$19,881)
2	Weldon Spring	$158,548 (±$13,796)
3	Dardenne Prairie	$152,500 (±$19,964)
4	Weldon Spring Heights	$143,750 (±$80,405)
5	Cottleville	$131,310 (±$28,368)
6	Flint Hill	$130,208 (±$45,563)
7	Lake St. Louis	$125,693 (±$12,310)
8	Foristell	$116,581 (±$17,822)
9	New Melle	$114,375 (±$35,122)
10	Wentzville	$112,394 (±$6,343)
11	West Alton	$111,500 (±$51,317)
12	O'Fallon	$110,443 (±$5,849)
13	Josephville	$107,708 (±$65,400)

Showing 13 of 17 places in St. Charles County, ranked from highest to lowest.

Survey years: 2020–2024 (American Community Survey 5-year estimates), compared with 2015–2019.

Margins of error are at the 90% confidence level.

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Questions about Lake St. Louis

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

The median household income in Lake St. Louis is $125,693 (±$12,310) a year (2020–2024 American Community Survey).

How much do you need to make to afford rent in Lake St. Louis?

About $63,500 a year, if rent is to stay at or below 30% of income at the median gross rent of $1,588 a month.

Have incomes in Lake St. Louis kept up with inflation?

In Lake St. Louis, the median household income went from $92,298 in 2015–2019 to $125,693 in 2020–2024 (+36.2%).

Prices (CPI-U) rose 22.7% over the same years; the change is not measurably different from the rise in prices.

What do renters earn in Lake St. Louis?

The median renting household in Lake St. Louis, MO earns $69,328 (±$15,121) a year.

Sources

To check these figures in the Census Bureau’s own API, request the variables below from the 2024 ACS 5-year data profile (acs/acs5/profile) and detailed tables (acs/acs5) for Lake St. Louis city, Missouri (place:40043, in state:29).

Each estimate (E or PE) has a margin of error beside it (M or PM).

The 2015–2019 figures are B19013_001E, B19013_001M, B25064_001E, B25064_001M, B25077_001E, B25077_001M from the 2019 release.

The API needs a free key.

Request a Census API key.

DP03_0062E, DP03_0062M, B25119_003E, B25119_003M, B25119_002E, B25119_002M, DP04_0134E, DP04_0134M

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Figures are published by the US Census Bureau, HUD, the Bureau of Labor Statistics and the FBI; Seayora reproduces them and does not adjust them, except where a sentence says it compares dollar figures after inflation. They describe the whole place, not any one building or street, and are not an appraisal, a rent determination, a tax bill, a safety rating or legal advice.