On its age, its old homes and the National Register, Union Township is more historic than 63% of U.S. towns, #503 of 993 in Ohio. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
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HistoryA character grade: shown, never part of Union Township’s overall grade.
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 Union Township’s 0.0 sits below most of its state (23% of Ohio towns have fewer) while its 0 listings outnumber those of 23% of U.S. towns.
How sure. Graded on two of the three inputs, so a change in either one moves the letter more than it would with three. The pre-1940 share is a Census survey estimate (±10.3 points).
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 →
What stands out about Union Township’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Lost post offices, old corners, places now gone and burying grounds
Another post office, Millwood, opened and closed inside today’s town.
Hamlets and corners on the map
MillwoodOak HillUmbria
Gone or out of use
Elm FarmlocaleFlat Run SchoolschoolJelloway Valley FarmlocaleMillwood Post Officepost officeOakhill SchoolschoolPleasant Valley SchoolschoolSchool Number 3schoolSeven Spring FarmlocaleTager Valley Schoolschool
5cemeteries and burying grounds inside Union Township
BrinkhavenMcKeeMillwoodSaint LukesWorkman
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
The story so far
Union Township, in brief
Wikipedia doesn’t have a history of Union Township yet. The photos, dates and memories neighbors add here are how it gets written.
Union Township is one of the twenty-two townships of Knox County, Ohio, United States. The 2020 census found 2,620 people in the township.
Its population held steady between the last two censuses: 2,646 in 2010, 2,620 in 2020.
Intro from Wikipedia. Population: U.S. Census Bureau.
Timeline
Union Township, 1833 to 1913
Woven from the archive, old maps, post office records, the National Register and the people born here.
Every edition of the U.S. Geological Survey’s map of Union Township. Tap a year, or press play to watch the town change.
1913Brinkhaven sheet · 1:62,500
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Union Township.
Famous people
Famous people close to Union Township
Nobody well known was born in Union Township itself, so here are the best known from just nearby.
Union Township is more historic than 63% of U.S. towns, #503 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.
How old are the homes in Union Township?
37% of Union Township’s homes were built before 1940 (Census estimate, ±10.3 points), against a typical 15% for an Ohio town; the median home was built in 1960.
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 (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.