More historic than 40% of U.S. towns · #751 of 993 in Ohio. What drives it
Most of Union Township was built recently: 5% of its homes predate 1940 and the median home dates from 1994. Below: maps from 1914 on and old-book passages.
Founding year: Wikipedia. First post office: 1871.
History grade
What drives Union Township’s History grade
On its age, its old homes and the National Register, Union Township is more historic than 40% of U.S. towns, #751 of 993 in Ohio. Its age holds the grade up; its National Register listings pull it down.
C+
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.
NoteThe founding year comes from Wikipedia alone; no second source gives 1815.
How sure. Graded on any two of the three inputs instead, the letter would range from C− to B−. The pre-1940 share is a Census survey estimate (±4.6 points).
Founding year: Wikipedia (other dates in Quick answers). 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.
3cemeteries and burying grounds inside Union Township
Bakers OrchardDeerfieldFellowship
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
On the map
Union Township on the map, 1914 to 1974
Every edition of the U.S. Geological Survey’s map of Union Township. Tap a year, or press play to watch the town change.
1914Morrow 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.
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 eleven townships of Warren County, Ohio, United States, located in the central part of the county. It was established January 3, 1815 and named Union as it was formed from parts of Deerfield and Turtlecreek Townships. The population was 6,251 as of the 2020 census.
Union Township was established in 1815. Between the 2010 and 2020 censuses its population grew from 4,696 to 6,251 (+33%).
Intro from Wikipedia. Population: U.S. Census Bureau.
From the old history books
What they wrote about Union Township in 1882
Passages that mention Union Township, cut from the printed page as they were published.
The History of Warren County, Ohio1882 · page 717Read the page →
Read the text
X Dr. S. S. Scoville, of Lebanon, who has given considerable attention to the archaeology of Warren County, writes as follows : The only ancient works of defense in Union Township, so far as is known, are situated adjacent to the village of Deerfield, on the farm of Mr. D. Hufford. As seen at the early settlement of the country, they consisted of two circular inclosures. The Lebanon and Deerfield road passes through the smaller circle, where portions of the embankment are still visible. A little to the west of these works are two mounds. They are some thirty
Text read by machine from the scan; it may contain errors.
Scans and text from the Internet Archive. Books published in 1930 or earlier, which are in the public domain.
Timeline
Union Township, 1808 to 1914
Woven from the archive, old maps, post office records, the National Register and the people born here.
In 1815, according to Wikipedia’s history of the town. Union Township’s post office opened in 1871.
How does Union Township rank for history?
Union Township is more historic than 40% of U.S. towns, #751 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?
5% of Union Township’s homes were built before 1940 (Census estimate, ±4.6 points), against a typical 15% for an Ohio town; the median home was built in 1994.
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 (5), Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, the US Post Offices dataset (Blevins & Helbock), the USGS Geographic Names Information System and old county and town histories (Internet Archive). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.
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