Clayton is a city in St. Louis County, Missouri, home to about 17,380 people across 2.5 square miles. Its ZIP code is 63105, and parts of 63117 and 63124 are in Clayton too.
Homes sold for a median of $345 per square foot in the three months ending August 2026, a seller’s market.
Mostly Clayton; also University City
Mostly Richmond Heights; part is in Clayton
Mostly Ladue; part is in Clayton
Each card is that ZIP code’s whole market, including any part outside Clayton. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Clayton’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | St. Louis Lambert International Airport (STL)7 miles away |
|---|---|
| Nearest city of 250,000+ | St. Louis, MO5 miles away |
| Nearest city of 1 million+ | Chicago, IL261 miles away |
Straight-line distances from the center of Clayton; 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.
Clayton had 17,355 residents in the 2020 census, up 35% since 2000.
It’s the 50th largest of 1,060 towns in Missouri by population.
St. Louis County grew from 50,040 residents in 1900 to 1,004,125 in 2020.
St. Louis County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 90°F in summer, and winter lows average 25°F. About 43.9 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, St Louis Sci Ctr, MO weather station (3 miles away).
629,036 jobs at 29,717 businesses in St. Louis County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
468 doctors and other health care providers list an office in Clayton.
Nearest hospitals
Providers with an office here
| Primary care doctors | 15 |
|---|---|
| Specialist doctors | 21 |
| Dentists | 41 |
| Nurse practitioners and physician assistants | 18 |
| Mental health providers | 274 |
| Physical and occupational therapists | 85 |
| Chiropractors | 14 |
| Pharmacies | 5 |
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 (19 nearby)
Grocery stores (2 nearby)
Pharmacies (4 nearby)
Libraries (5 nearby)
Museums (1 nearby)
Theaters and performance venues (5 nearby)
Counts are within about 1.5 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.
Established in 1877.
Colleges and universities
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Clayton, Specl. Sch. Dst. St. Louis Co.. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Family Ctr.Clayton | Pre-K | — | Public | 1.3 mi |
| Glenridge Elem.Clayton | K–5 | 321 | Public | 0.4 mi |
| Meramec Elem.Clayton | K–5 | 368 | Public | 0.6 mi |
| Ralph M. Captain Elem.Clayton | K–5 | 286 | Public | 0.9 mi |
| Juvenile Detention Ctr.Clayton | 6–12 | 44 | Alternative Education | 0.7 mi |
| Wydown MiddleClayton | 6–8 | 604 | Public | 1.0 mi |
| Clayton HighClayton | 9–12 | 788 | Public | 1.0 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Central Christian SchoolSaint Louis | Pre-K–6 | 171 | Presbyterian | 0.4 mi |
| Our Lady of Lourdes SchoolClayton | Pre-K–8 | 260 | Roman Catholic | 0.5 mi |
| The St Michael School of ClaytonSaint Louis | Pre-K–8 | 71 | Episcopal | 1.3 mi |
| The Wilson SchoolClayton | Pre-K–6 | 147 | Nonsectarian | 1.3 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.
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Shares ZIP codes with Ladue, Richmond Heights, University City and St. Louis.
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.