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Weldon Spring, MO

City in St. Charles County, Missouri. ZIP codes: 63304.

Population

5,310

Land area

7.6sq mi

People per sq mi

694

ZIP codes

1

Weldon Spring and its ZIP codes

Full map

Weldon Spring at a glance

  • Weldon Spring is about 7.7 times as dense as Missouri as a whole.
  • By population, it ranks 140th among 1,062 cities and towns in Missouri.
  • The median household income is $158,548, about 2.2 times the Missouri median of $70,702.
  • A typical owner-occupied home is valued at $544,300 (about 2.4 times the Missouri figure) and median rent is $2,800 a month.

Local data for Weldon Spring, MO

Counts from official public data

Housing and community stats

Weldon Spring, MO, American Community Survey 2020-2024

Full profile

Median household income

$158,548

Poverty rate

0.7%

Median home value

$544,300

Median rent

$2,800/mo

Homeownership

83.4%

Bachelor's or higher

57.9%

Median age

52.2

Average commute

21.7 min

Largest reported origins and ancestries: German Americans (1,732), Irish Americans (921), Italian Americans (386).

Home values and rentsIncome, education and commute

Economy and federal money

Jobs, pay, income and spending are for St. Charles County. PPP loans are for Weldon Spring.

Details

Unemployment rate

3.3%

Aug 2026, -0.3 pts in a year

Average annual pay

$62,680

162,655 jobs, 2025

Income per person

$71,954

BEA, 2024

Federal spending

$2.5B

FY 2026, $6,244 per person

St. Charles County economyFederal spending

How people get to work

Weldon Spring, MO, workers 16 and older. American Community Survey 5-year estimates

  • Drove alone65.3%
  • Carpooled3.5%
  • Public transit0.0%
  • Walked0.0%
  • Bicycle0.0%
  • Taxi, ride-hailing, motorcycle or other0.0%
  • Worked from home31.1%

Average one-way commute: 21.7 minutes for people who do not work from home.

Environment and hazard risk

Weldon Spring, MO, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Moderate

Top: strong wind

Storm events since 1996

865

Countywide, mostly thunderstorm wind

Flood insurance policies

1,076

0.8% of homes, county

July high / Jan low

88° / 21°F

44.4 inches of rain a year

Hazards, floods and storm historyCheck a flood zone

Health statistics

Share of adults in Weldon Spring, MO, CDC PLACES estimates

All 40 measures

Obesity

33.0%

U.S. 33.3% about the same

Diabetes

11.3%

U.S. 12.1% -0.8 pts

Smoking

9.5%

U.S. 12.8% -3.3 pts

Uninsured (18-64)

4.3%

U.S. 11.1% -6.8 pts

ZIP codes in Weldon Spring

1 in or overlapping Weldon Spring. Population shown

·

Cities near Weldon Spring

NameDistanceLand area (sq mi)
Weldon Spring HeightsTown1.8 mi0.1
CottlevilleCity2.8 mi4.7
St. PetersCity4.6 mi22.5
ChesterfieldCity5.5 mi31.8
Dardenne PrairieCity5.6 mi5.3
Clarkson ValleyCity6.7 mi2.7
O'FallonCity6.7 mi30.6
Lake St. LouisCity8.9 mi8.5
DefianceCensus-designated place8.9 mi1
WildwoodCity9.1 mi66.7
EllisvilleCity9.3 mi4.4
Maryland HeightsCity9.9 mi21.9
St. CharlesCity10 mi25.2
BallwinCity10 mi9.1
St. PaulCity11 mi7.2
Town and CountryCity11 mi11.5

Frequently asked questions

What county is Weldon Spring, MO in?
Weldon Spring is in St. Charles County, Missouri.
What ZIP codes are in Weldon Spring, MO?
ZIP codes in or overlapping Weldon Spring include 63304.
What is the population of Weldon Spring, MO?
About 5,310 people live in Weldon Spring, based on American Community Survey 5-year estimates.
What cities are near Weldon Spring?
Nearby places include Weldon Spring Heights (1.8 mi), Cottleville (2.8 mi), St. Peters (4.6 mi), Chesterfield (5.5 mi), Dardenne Prairie (5.6 mi).

Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023