Cainsville is a city in Mercer County, Missouri, home to about 212 people across 1.4 square miles. Its ZIP code is 64632.
Mostly Cainsville
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| Nearest major airport | Des Moines International Airport (DSM)75 miles away |
|---|---|
| Closer regional airport | Kirksville Regional Airport (IRK)69 miles away |
| Nearest city of 250,000+ | Kansas City, MO101 miles away |
| Nearest city of 1 million+ | Chicago, IL330 miles away |
Straight-line distances from the center of Cainsville; 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.
Cainsville had 283 residents in the 2020 census, down 24% since 2000.
It’s the 718th largest of 1,060 towns in Missouri by population.
Mercer County grew from 14,706 residents in 1900 to 3,538 in 2020.
Mercer 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 15°F. About 38 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Princeton, MO weather station (10 miles away).
384 jobs at 79 businesses in Mercer County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
2 doctors and other health care providers list an office in Cainsville.
Nearest hospitals
Providers with an office here
| Nurse practitioners and physician assistants | 2 |
|---|
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.
Public schools here are run by Cainsville R-I. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Cainsville Elem.Cainsville | Pre-K–5 | 48 | Public | 1.5 mi |
| Cainsville HighCainsville | 6–12 | 38 | Public | 1.5 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.