Caledonia is a village in Washington County, Missouri, home to about 209 people across 0.2 square miles. Its ZIP code is 63631.
Mostly Caledonia
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| Nearest major airport | St. Louis Lambert International Airport (STL)71 miles away |
|---|---|
| Nearest city of 250,000+ | St. Louis, MO66 miles away |
| Nearest city of 1 million+ | Chicago, IL325 miles away |
Straight-line distances from the center of Caledonia; 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.
Caledonia had 131 residents in the 2020 census, down 17% since 2000.
It’s the 721st largest of 1,060 towns in Missouri by population.
Washington County grew from 14,263 residents in 1900 to 23,514 in 2020.
Washington County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 86°F in summer, and winter lows average 21°F. About 45.5 inches of rain and melted snow fall in a typical year, with about 12 inches of snow.
Source: NOAA 1991–2020 climate normals, Potosi 4 Sw, MO weather station (11 miles away).
3,263 jobs at 371 businesses in Washington County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
Nearest hospitals
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances.
Public schools here are run by Valley R-Vi. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Caledonia Elem.Caledonia | Pre-K–6 | 198 | Public | 2.3 mi |
| Valley HighCaledonia | 7–12 | 170 | Public | 2.3 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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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.