Greencastle is a city in Adair County, Missouri, home to about 332 people across 0.5 square miles. Its ZIP code is 63544.
Mostly Greencastle
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| Nearest major airport | Des Moines International Airport (DSM)96 miles away |
|---|---|
| Closer regional airport | Kirksville Regional Airport (IRK)21 miles away |
| Nearest city of 250,000+ | Kansas City, MO119 miles away |
| Nearest city of 1 million+ | Chicago, IL291 miles away |
Straight-line distances from the center of Greencastle; 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.
Greencastle had 224 residents in the 2020 census, down 27% since 2000.
It’s the 615th largest of 1,060 towns in Missouri by population.
Adair County grew from 21,728 residents in 1900 to 25,314 in 2020.
Adair County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 85°F in summer, and winter lows average 13°F. About 40.9 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Green City 5n, MO weather station (7 miles away).
8,275 jobs at 606 businesses in Adair 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 Greencastle.
Nearest hospitals
Providers with an office here
| Specialist doctors | 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.
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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.