Casstown is a village in Miami County, Ohio, home to about 259 people across 0.1 square miles. It has no ZIP code of its own: it’s part of 45312.
Homes sold for a median of $201 per square foot in the three months ending August 2026, a buyer’s market.
Part is in Casstown, part in Christiansburg
Each card is that ZIP code’s whole market, including any part outside Casstown. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Casstown’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | John Glenn Columbus International Airport (CMH)65 miles away |
|---|---|
| Closer regional airport | James M. Cox Dayton International Airport (DAY)13 miles away |
| Nearest city of 250,000+ | Columbus, OH60 miles away |
| Nearest city of 1 million+ | Chicago, IL223 miles away |
Straight-line distances from the center of Casstown; 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.
Casstown had 270 residents in the 2020 census, down 16% since 2000.
It’s the 1060th largest of 1,264 towns in Ohio by population.
Miami County grew from 43,105 residents in 1900 to 108,774 in 2020.
Miami County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 84°F in summer, and winter lows average 21°F. About 40.9 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Piqua Wwtp, OH weather station (8 miles away).
37,513 jobs at 2,176 businesses in Miami 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 Casstown.
Nearest hospitals
Providers with an office here
| Mental health providers | 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.
Public schools here are run by Miami East Local. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Miami East ElementaryCasstown | K–5 | 602 | Public | 1.2 mi |
| Miami East Junior High SchoolCasstown | 6–8 | 327 | Public | 1.2 mi |
| Miami East High SchoolCasstown | 9–12 | 401 | Public | 1.1 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 Christiansburg.
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.