St. Henry is a village in Mercer County, Ohio, home to about 2,741 people across 1.7 square miles. Its ZIP code is 45883.
Homes sold for a median of $104 per square foot in the three months ending August 2026.
Mostly St. Henry
Each card is that ZIP code’s whole market, including any part outside St. Henry. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Cincinnati Northern Kentucky International Airport (CVG)94 miles away |
|---|---|
| Closer regional airport | James M. Cox Dayton International Airport (DAY)41 miles away |
| Nearest city of 250,000+ | Fort Wayne, IN54 miles away |
| Nearest city of 1 million+ | Chicago, IL187 miles away |
Straight-line distances from the center of St. Henry; 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.
St. Henry had 2,596 residents in the 2020 census, up 14% since 2000.
It’s the 422nd largest of 1,264 towns in Ohio by population.
Mercer County grew from 28,021 residents in 1900 to 42,528 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 84°F in summer, and winter lows average 19°F. About 40.1 inches of rain and melted snow fall in a typical year, with about 29 inches of snow.
Source: NOAA 1991–2020 climate normals, Celina 3 Ne, OH weather station (12 miles away).
17,679 jobs at 1,050 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).
17 doctors and other health care providers list an office in St. Henry.
Nearest hospitals
Providers with an office here
| Primary care doctors | 2 |
|---|---|
| Dentists | 2 |
| Nurse practitioners and physician assistants | 5 |
| Physical and occupational therapists | 2 |
| Optometrists | 3 |
| Chiropractors | 3 |
| Pharmacies | 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.
Parks (1 nearby)
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 St Henry Consolidated Local. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| St Henry Elementary SchoolSaint Henry | Pre-K–4 | 489 | Public | 0.5 mi |
| St Henry Middle SchoolSaint Henry | 5–8 | 300 | Public | 0.5 mi |
| St Henry High SchoolSaint Henry | 9–12 | 296 | Public | 0.5 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.