Gray Summit is a community in Franklin County, Missouri, home to about 2,991 people across 7.7 square miles. Its ZIP code is 63039, and parts of 63055 and 63069 are in Gray Summit too.
Homes sold for a median of $135 per square foot in the three months ending August 2026.
All in Gray Summit
Part is in Gray Summit
Mostly Pacific; part is in Gray Summit
Each card is that ZIP code’s whole market, including any part outside Gray Summit. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | St. Louis Lambert International Airport (STL)29 miles away |
|---|---|
| Nearest city of 250,000+ | St. Louis, MO32 miles away |
| Nearest city of 1 million+ | Chicago, IL283 miles away |
Straight-line distances from the center of Gray Summit; 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.
Gray Summit had 3,055 residents in the 2020 census, up 16% since 2000.
It’s the 204th largest of 1,060 towns in Missouri by population.
Franklin County grew from 30,581 residents in 1900 to 104,682 in 2020.
Franklin 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 20°F. About 44.2 inches of rain and melted snow fall in a typical year, with about 8 inches of snow.
Source: NOAA 1991–2020 climate normals, Washington, MO weather station (10 miles away).
35,466 jobs at 2,702 businesses in Franklin County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
1 doctors and other health care providers list an office in Gray Summit.
Nearest hospitals
Providers with an office here
| Chiropractors | 1 |
|---|
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 (1 nearby)
Grocery stores (1 nearby)
Pharmacies
Libraries
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.
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Shares ZIP codes with Pacific, Wildwood, Eureka, LaBarque Creek and Lake Tekakwitha.
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.