Each edition grades its towns against each other only.
More historic than 90% of U.S. towns · #148 of 993 in Ohio. What drives it
Its Register listings are the Warnke Covered Bridge. Below: 2 old photos and papers and maps from 1986 on.
More historic than 90% of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, Harrison Township is more historic than 90% of U.S. towns, #148 of 993 in Ohio. All 2 inputs are above most U.S. towns; its share of homes from before 1940 ranks highest and its National Register listings lowest.
Ohio towns list about as much on the Register as the country (a typical Ohio town has 2.9 per 10,000 residents, the U.S. 2.4), so Harrison Township’s 4.7 sits near the middle of its state (63% of Ohio towns have fewer) while its 2 listings outnumber those of 60% of U.S. towns.
Founding year: our sources. Homes: Census ACS 2020–24. National Register: National Park Service, May 2026 list; each listing counted once (boundary changes and added documentation belong to their listing), and a historic district counts its contributing buildings. How TownRatings grades history →
Read from the archive, the National Register and the record. The page puts what stands out first.
The first neighbors to add old photos shape how Harrison Township’s history is told.
Wikipedia doesn’t have a history of Harrison Township yet. The photos, dates and memories neighbors add here are how it gets written.
Harrison Township is one of the twelve townships of Preble County, Ohio, United States. The 2020 census found 4,305 people in the township.
Between the 2010 and 2020 censuses its population fell from 4,594 to 4,305 (-6%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Woven from the archive, old maps, post office records, the National Register and the people born here.
On the mapFirst mapped by the U.S. Geological SurveyThe U.S. Geological Survey’s map of Harrison Township.
1986Dayton sheet · 1:100,000U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Harrison Township.
No then-and-now pairs yet. Take a photo from the same spot as an old one and they appear here side by side.
Find the spot, match the angle, and add your photo. It becomes the first then-and-now pair on Harrison Township’s page.
Retake this view · +15The country’s official list of buildings and places worth saving.
National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.
Nobody well known was born in Harrison Township itself, so here are the best known from just nearby.
Another post office, West Sonora, opened and closed inside today’s town.
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Each neighbor’s History grade, on the same three inputs.
Harrison Township is more historic than 90% of U.S. towns, #148 of 993 in Ohio. The History grade combines the town’s founding era, the share of homes built before 1940 and its National Register listings. It’s a character grade, so it isn’t part of the overall grade. How it works.
2 listings: 1 structure.
39% of Harrison Township’s homes were built before 1940 (Census estimate, ±4.7 points), against a typical 15% for an Ohio town; the median home was built in 1956.
What the archives can’t tell you, neighbors can.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021).
From Wikimedia Commons (2), the Library of Congress (2), the National Register of Historic Places (1), U.S. Geological Survey historical maps, the US Post Offices dataset (Blevins & Helbock) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.
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2015
2007
