Cobalt is a village in Madison County, Missouri, home to about 364 people across 0.1 square miles. It has no ZIP code of its own: it’s part of 63645.
Homes sold for a median of $132 per square foot in the three months ending August 2026, a balanced market.
Mostly Fredericktown; part is in Cobalt
Each card is that ZIP code’s whole market, including any part outside Cobalt. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Cobalt’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)87 miles away |
|---|---|
| Closer regional airport | Cape Girardeau Regional Airport (CGI)46 miles away |
| Nearest city of 250,000+ | St. Louis, MO79 miles away |
| Nearest city of 1 million+ | Chicago, IL332 miles away |
Straight-line distances from the center of Cobalt; 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.
Cobalt had 264 residents in the 2020 census, up 40% since 2000.
It’s the 599th largest of 1,060 towns in Missouri by population.
Madison County grew from 9,975 residents in 1900 to 12,626 in 2020.
Madison 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 46.4 inches of rain and melted snow fall in a typical year, with about 9 inches of snow.
Source: NOAA 1991–2020 climate normals, Fredericktown, MO weather station (6 miles away).
3,148 jobs at 231 businesses in Madison County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
64 doctors and other health care providers list an office in Cobalt.
Nearest hospitals
Providers with an office here
| Primary care doctors | 10 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 3 |
| Nurse practitioners and physician assistants | 14 |
| Mental health providers | 28 |
| Physical and occupational therapists | 5 |
| Optometrists | 1 |
| Chiropractors | 2 |
| Pharmacies | 8 |
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.
Grocery stores
Counts are within about 1 mile 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 Fredericktown R-I. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Fredericktown Elem.Fredericktown | Pre-K–2 | 446 | Public | 5.1 mi |
| Fredericktown IntermediateFredericktown | 3–5 | 393 | Public | 6.2 mi |
| Kelly A Burlison Middle SchoolFredericktown | 6–8 | 433 | Public | 6.1 mi |
| Fredericktown HighFredericktown | 9–12 | 611 | Public | 6.1 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Fredericktown, Junction City, Mine La Motte and Cherokee Pass.
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.