Delhi Township’s post office opened in 1834, and 2 of its places are on the National Register
More historic than 60% of U.S. towns · #542 of 993 in Ohio. What drives it
Most of Delhi Township was built recently: 7% of its homes predate 1940 and the median home dates from 1969. Its Register listings are the W. L. Williams House and the Mater Dei Chapel. Below: maps from 1914 on and the census since 1820.
The Delhi Township post office opened in 1834, the earliest record of the town by name. Two smaller post offices, Delhi (1834) and Industry (1851), opened inside today’s town and later closed.
First census: 1,158 in 18202020 census: 28,760192 years
How historic is Delhi Township?
B
More historic than 60% of U.S. towns, on its age, its old homes and the National Register.
Founding year: the first Delhi Township post office (Blevins & Helbock, CC0).The full story ↓
History grade
What drives Delhi Township’s History grade
On its age, its old homes and the National Register, Delhi Township is more historic than 60% of U.S. towns, #542 of 993 in Ohio. Its age holds the grade up; its share of homes from before 1940 pulls it down.
B
HistoryA character grade: shown, never part of Delhi 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 Delhi Township’s 0.7 sits near the middle of its state (48% of Ohio towns have fewer) while its 2 listings outnumber those of 60% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from C+ to B+. The pre-1940 share (±1.6 points) is firm at this size. The founding year is the first post office, not a stated founding date.
Founding year: the first post office (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 Delhi Township’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
The area of modern-day Delhi Township was first settled by European Americans in 1789 with the founding of the village of South Bend. A year later, when Hamilton County was incorporated, the village loaned its name to South Bend township, which included the present-day location of Delhi Township. In 1809, South Bend Township was divided into Green and Miami townships. Delhi was later split from the southern portions of Green Township in 1816 as a result of a petition from residents. Upon incorporation, the township's name was originally spelled as "Delhigh", although the name morphed into "Delhi" sometime in the nineteenth century for unknown reasons.
Every edition of the U.S. Geological Survey’s map of Delhi Township. Tap a year, or press play to watch the town change.
1914West Cincinnati 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 Delhi Township.
On the National Register
2 historic places in Delhi Township
The country’s official list of buildings and places worth saving.
The Delhi Township post office opened in 1834, the earliest record of the town by name (U.S. post office records).
How does Delhi Township rank for history?
Delhi Township is more historic than 60% of U.S. towns, #542 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 Delhi Township?
Two places: the W. L. Williams House (listed 1977) and the Mater Dei Chapel (2024).
How old are the homes in Delhi Township?
7% of Delhi Township’s homes were built before 1940 (Census estimate, ±1.6 points), against a typical 15% for an Ohio town; the median home was built in 1969.
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 the National Register of Historic Places (2), 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.
