Weldon Spring is a city in St. Charles County, Missouri, home to about 5,310 people across 7.7 square miles. It has no ZIP code of its own: it’s part of 63304.
Homes sold for a median of $198 per square foot in the three months ending August 2026, a seller’s market.
Part is in Weldon Spring, part in St. Peters and Cottleville
Each card is that ZIP code’s whole market, including any part outside Weldon Spring. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Weldon Spring’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows Weldon Spring well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | St. Louis Lambert International Airport (STL)14 miles away |
|---|---|
| Nearest city of 250,000+ | St. Louis, MO22 miles away |
| Nearest city of 1 million+ | Chicago, IL264 miles away |
Straight-line distances from the center of Weldon Spring; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Weldon Spring had 5,326 residents in the 2020 census, up 1% since 2000.
It’s the 140th largest of 1,060 towns in Missouri by population.
St. Charles County grew from 24,474 residents in 1900 to 405,262 in 2020.
St. Charles County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 88°F in summer, and winter lows average 21°F. About 42.4 inches of rain and melted snow fall in a typical year, with about 15 inches of snow.
Source: NOAA 1991–2020 climate normals, St Peters 2 Se, MO weather station (3 miles away).
143,624 jobs at 8,946 businesses in St. Charles County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
323 doctors and other health care providers list an office in Weldon Spring.
Nearest hospitals
Providers with an office here
| Primary care doctors | 22 |
|---|---|
| Specialist doctors | 19 |
| Dentists | 19 |
| Nurse practitioners and physician assistants | 44 |
| Mental health providers | 101 |
| Physical and occupational therapists | 73 |
| Optometrists | 9 |
| Chiropractors | 36 |
| Pharmacies | 12 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (5 nearby)
Grocery stores (4 nearby)
Pharmacies (3 nearby)
Libraries (1 nearby)
Museums
Counts are within about 2 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Francis Howell R-III. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Central Elem.St Charles | Pre-K–5 | 865 | Public | 0.8 mi |
| Early Child Family Educ. Ctr.St Charles | Pre-K | 117 | Public | 0.8 mi |
| Early Child. Family Educ. CtrSt Charles | Pre-K | 224 | Public | 3.3 mi |
| Castlio Elem.St Charles | K–5 | 847 | Public | 1.5 mi |
| Independence Elem.St Charles | K–5 | 762 | Public | 3.2 mi |
| Westwood Trail AcademySt Charles | 2–12 | — | Public | 2.6 mi |
| Bryan MiddleSt Charles | 6–8 | 827 | Public | 3.0 mi |
| Francis Howell MiddleSt Charles | 6–8 | 799 | Public | 3.1 mi |
| Hollenbeck MiddleSt Charles | 6–8 | 769 | Public | 0.7 mi |
| Saeger MiddleSt Charles | 6–8 | 750 | Public | 1.4 mi |
| Francis Howell Central HighSt Charles | 9–12 | 1,750 | Public | 1.4 mi |
| Francis Howell HighSt Charles | 9–12 | 1,843 | Public | 5.6 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| St Joseph SchoolSaint Charles | Pre-K–8 | 891 | Roman Catholic | 1.6 mi |
| Sts Joachim & Ann SchoolSaint Charles | Pre-K–8 | 155 | Roman Catholic | 1.8 mi |
| Zion Lutheran SchoolSaint Charles | Pre-K–8 | 364 | Lutheran Church–Missouri Synod | 2.1 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
Buying or selling around Weldon Spring? Tell us what you need and when. No agents advertise here yet, so we’ll keep your request for up to 30 days and send it to local agents who join. No obligation, and you choose who to work with.
Loading map…
Shares ZIP codes with St. Peters, Cottleville, O'Fallon and Weldon Spring Heights.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.