Founding year: Wikipedia. First post office: 1850.The full story ↓
History grade
What drives St. Henry’s History grade
On its age, its old homes and the National Register, St. Henry is more historic than 76% of U.S. towns, #355 of 993 in Ohio. All 3 inputs are above most U.S. towns; its age ranks highest and its share of homes from before 1940 lowest.
A−
HistoryA character grade: shown, never part of St. Henry’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. Henry’s 10.9 sits above most of its state (75% of Ohio towns have fewer) while its 3 historic buildings outnumber those of 65% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from B+ to A−. The pre-1940 share is a Census survey estimate (±4.6 points). Two sources give 1837.
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 St. Henry’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
St. Henry was laid out in 1837 by Johann Heinrich Römer (1805–1874). It laid in a tract of land sold to him by his brother Franz on July 7, 1837. The tract was surveyed on July 7, the town was platted on July 13, and the plat was recorded on July 15. July 13 is the feast of St. Henry. At the center of the village is St. Henry's Catholic Church. Completed in 1897, the church is listed on the National Register of Historic Places. A post office has been in operation at St. Henry since 1850. The village was incorporated in 1901.
Old hamlets and crossroads still carry their names on the map.
Hamlets and corners on the map
Osterholt Mobile Home ParkSaint Henry
1cemetery inside St. Henry
Saint Henry Catholic
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Questions about St. Henry’s history
What year was St. Henry founded?
In 1837, according to Wikipedia’s history of the town. St. Henry’s post office opened in 1850, and the census of 1880 counted 4 people here.
How does St. Henry rank for history?
St. Henry is more historic than 76% of U.S. towns, #355 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. Henry?
One place: the St. Henry Catholic Church (listed 1979).
How old are the homes in St. Henry?
12% of St. Henry’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 1983.
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 National Register of Historic Places (1), Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), 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.
2015
2004
