Port William is a village in Clinton County, Ohio, home to about 175 people across 0.1 square miles. Its ZIP code is 45164.
Homes sold for a median of $196 per square foot in the three months ending August 2026.
Mostly Port William
Each card is that ZIP code’s whole market, including any part outside Port William. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | John Glenn Columbus International Airport (CMH)57 miles away |
|---|---|
| Closer regional airport | James M. Cox Dayton International Airport (DAY)33 miles away |
| Nearest city of 250,000+ | Cincinnati, OH48 miles away |
| Nearest city of 1 million+ | Chicago, IL258 miles away |
Straight-line distances from the center of Port William; 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.
Port William had 229 residents in the 2020 census, down 11% since 2000.
It’s the 1142nd largest of 1,264 towns in Ohio by population.
Clinton County grew from 24,202 residents in 1900 to 42,018 in 2020.
Clinton 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 20°F. About 43.3 inches of rain and melted snow fall in a typical year, with about 23 inches of snow.
Source: NOAA 1991–2020 climate normals, Wilmington 3 N, OH weather station (4 miles away).
17,384 jobs at 712 businesses in Clinton 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.
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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.