Lake St. Louis vs Weldon Spring

A side-by-side comparison of Lake St. Louis and Weldon Spring: population, income, housing, and more.

Lake St. Louis and Weldon Spring are places in Missouri. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Lake St. Louis has the higher population (17,538 vs 5,291 in Weldon Spring). Weldon Spring has the higher median household income ($155,081 vs $123,427 in Lake St. Louis). Weldon Spring has the higher median home value ($523,300 vs $375,300 in Lake St. Louis).

Population, income & housing

	Lake St. Louis	Weldon Spring
Population	17,538	5,291
Median age	43.2 yrs	53.5 yrs
Median household income	$123,427	$155,081
Median home value	$375,300	$523,300
Median gross rent	$1,608	$2,692
Housing units	7,495	2,213
Homeownership rate	75.2%	85.9%
Bachelor's degree or higher	49.5%	53.4%
Unemployment rate	4.5%	5.7%

Trends (ACS 5-year, 2019–2023)

	Lake St. Louis	Weldon Spring
Population	15,989 → 17,538 (+9.7%)	5,531 → 5,291 (-4.3%)
Median household income	$92,298 → $123,427 (+33.7%)	$107,875 → $155,081 (+43.8%)
Median home value	$274,400 → $375,300 (+36.8%)	$397,300 → $523,300 (+31.7%)
Median gross rent	$1,130 → $1,608 (+42.3%)	$1,833 → $2,692 (+46.9%)

Lake St. Louis

Population

15,98917,538

Median household income

$92,298$123,427

Median home value

$274,400$375,300

Median gross rent

$1,130$1,608

Weldon Spring

Population

5,5315,291

Median household income

$107,875$155,081

Median home value

$397,300$523,300

Median gross rent

$1,833$2,692

Age & race/ethnicity

Age distribution (share)

	Lake St. Louis	Weldon Spring
Under 5	3.2%	2.2%
5 to 17	16.8%	15.5%
18 to 24	10.3%	6.4%
25 to 34	8.7%	2.8%
35 to 44	13.2%	10.9%
45 to 54	13.2%	13.6%
55 to 64	14.9%	20.7%
65 to 74	9.9%	14.4%
75 and over	9.8%	13.5%

Race & ethnicity (share)

	Lake St. Louis	Weldon Spring
White (non-Hispanic)	86.7%	92.1%
Black or African American	4.2%	1.2%
American Indian & Alaska Native	0.1%	0.0%
Asian	1.5%	4.9%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.4%	0.0%
Two or more races	4.4%	1.5%
Hispanic or Latino	2.8%	0.3%

Educational attainment (age 25+)

Share of adults 25+

	Lake St. Louis	Weldon Spring
No high school diploma	2.8%	2.1%
High school graduate	16.7%	19.9%
Some college or associate's	31.0%	24.6%
Bachelor's degree	32.4%	31.7%
Graduate or professional degree	17.1%	21.7%

Commute to work

How workers get to work (share)

	Lake St. Louis	Weldon Spring
Drove alone	75.3%	64.9%
Carpooled	5.7%	4.8%
Public transit	0.0%	0.0%
Walked	0.2%	0.0%
Bicycle	0.0%	0.0%
Worked from home	18.3%	30.3%
Other means	0.5%	0.0%

Housing

Units in structure (share)

	Lake St. Louis	Weldon Spring
1-unit, detached	66.9%	76.4%
1-unit, attached	12.2%	6.7%
2 to 4 units	2.9%	1.6%
5 to 19 units	14.2%	5.4%
20 or more units	3.8%	9.8%
Mobile home & other	0.0%	0.0%

Poverty & households

	Lake St. Louis	Weldon Spring
Poverty rate	4.1%	0.3%
Average household size	2.44	2.50
Mean commute (minutes)	27	23
Median year structure built	1999	1993