On its age, its old homes and the National Register, St. Clair Township is more historic than 81% of U.S. towns, #293 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.
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HistoryA character grade: shown, never part of St. Clair 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 St. Clair Township’s 11.8 sits above most of its state (76% of Ohio towns have fewer) while its 8 historic buildings outnumber those of 74% 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 (±4.7 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 St. Clair 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
Two other post offices opened and closed inside today’s town.
Overpecks Station
1860–1882
Woodsdale
1870–1906
Overpeck
1882–today
18601940today
Hamlets and corners on the map
BusenbarkCity View HeightsOverpeckSharon ParkWilliamsdaleWoodsdale Park
Gone or out of use
School Number 1schoolSchool Number 12schoolSchool Number 4schoolSchool Number 5schoolSchool Number 6schoolWoodsdale Post Officepost office
1cemetery inside St. Clair Township
Hickory Flats
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
On the map
St. Clair Township on the map, 1915 to 1988
Every edition of the U.S. Geological Survey’s map of St. Clair Township. Tap a year, or press play to watch the town change.
1915Hamilton 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 St. Clair Township.
One of the original five townships of Butler County, it was erected by the Butler County Court of Quarter Sessions on May 10, 1803.
The area of the township has been significantly reduced from the original boundaries. Four new townships were created from it: Milford Township and Wayne Township, both on December 2, 1805; Reily Township on December 7, 1807; and Hanover Township (from parts of St. Clair and Ross townships) on December 2, 1811. What is now Oxford Township was originally within the bounds of St. Clair Township, Oxford having been erected from Milford Township in 1811.
Nothing in the archives for these yearsWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
St. Clair Township is more historic than 81% of U.S. towns, #293 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.
What is on the National Register in St. Clair Township?
4 listings: 4 buildings, among them the John Sr. Kennel Farm (listed 1984, the first). 8 historic buildings in all.
How old are the homes in St. Clair Township?
17% of St. Clair 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 1962.
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), the National Register of Historic Places (4), Wikipedia, 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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