Each edition grades its towns against each other only.
Photo: Nyttend · Public domainMore historic than 82% of U.S. towns · #271 of 993 in Ohio. What drives it
6 places in town are on the National Register. Below: maps from 1914 on.
More historic than 82% of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, Jefferson Township is more historic than 82% of U.S. towns, #271 of 993 in Ohio. All 2 inputs are above most U.S. towns; its National Register listings ranks highest and its share of homes from before 1940 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 Jefferson Township’s 34.8 sits above most of its state (86% of Ohio towns have fewer) while its 48 historic buildings outnumber those of 85% 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 Jefferson Township’s history is told.
Another post office, Reservoir, 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).
Every edition of the U.S. Geological Survey’s map of Jefferson Township. Tap a year, or press play to watch the town change.
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Jefferson Township.
Wikipedia doesn’t have a history of Jefferson Township yet. The photos, dates and memories neighbors add here are how it gets written.
Jefferson Township is one of the fourteen townships of Mercer County, Ohio, United States. The 2020 census found 13,802 people in the township.
Between the 2010 and 2020 censuses its population grew from 13,155 to 13,802 (+5%).
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.
The 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 Jefferson Township itself, so here are the best known from just nearby.
Each neighbor’s History grade, on the same three inputs.
Jefferson Township is more historic than 82% of U.S. towns, #271 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.
6 listings: 1 structure. 48 historic buildings in all.
13% of Jefferson Township’s homes were built before 1940 (Census estimate, ±3.0 points), against a typical 15% for an Ohio town; the median home was built in 1971.
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 (3), 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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