The Radnor Township post office opened in 1827, the earliest record of the town by name. Another post office, Norton (1816), opened inside today’s town and later closed.
2020 census: 1,570199 years
How historic is Radnor Township?
A
More historic than 86% of U.S. towns, on its age, its old homes and the National Register.
Founding year: the first Radnor Township post office (Blevins & Helbock, CC0).The full story ↓
History grade
What drives Radnor Township’s History grade
On its age, its old homes and the National Register, Radnor Township is more historic than 86% of U.S. towns. 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 Radnor 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 Radnor Township’s 24.6 sits above most of its state (82% of Ohio towns have fewer) while its 4 listings outnumber those of 68% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would still be A−. The pre-1940 share is a Census survey estimate (±11.2 points). 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 Radnor Township’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Radnor was originally known as "Delhi", and under the latter name was laid out in 1833. Prior to being called Delhi, the town was called New Baltimore. New Baltimore existed as early as 1814. The present name was taken from Radnor Township.The Radnor area history from 1802 until 1825 is greatly affected by David Pugh, a Welshman from Radnorshire, Wales. Young David Pugh left Wales early in 1801 and landed in Philadelphia. He took up residence in Baltimore, Maryland for about a year working and learning English. He met a fellow Welshman, Dr. Samuel Jones who had received several acres of land for his service in the Revolutionary War. Dr. Jones also acquired additional land warrants for his service in the Revolutionary War. Using acquired 25 land warrants, Dr. Jones purchased one quarter township (4,000 acres) of land in 1798. The land was located in Ohio Federal township six of r…
Passages that mention Radnor Township, cut from the printed page as they were published.
20th century history of Delaware County, Ohio1908 · page 127Read the page →
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part of the city of Delaware, and runs in a northwesterly direction across the southwest Corner of Troy Township, where it has a station, and on through Radnor Township to Marion County. The station in Radnor Township is about a mile east of the village, and is known as Meredith. It was intended, originally, to run the road due north from Dela-
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20th century history of Delaware County, Ohio1908 · page 483Read the page →
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Radnor Township was created at the time the county was organized, but remained as then constituted only until the meeting of the rirst Commissioners Court, when on June 15, 1808. the township of Marlborough was created out of Radnor territory. Thompson and Troy were later segregated from Radnor and established as separate townships, leaving
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history of delaware county and ohio1880 · page 763Read the page →
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Robert Powell, to Radnor Township to look for a home for himself and family; not being satisfied with the country, he returned in a few months to his family in Wales, where he remained until 1851, when he again came to Radnor Township, this time bringing his family with him; he has since remained in the township, and now owns a nicely improved farm in the northeastern portion of the
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Scans and text from the Internet Archive. Books published in 1930 or earlier, which are in the public domain.
By decade
Radnor Township, decade by decade
One decade in the archive so far: the 1870s. Scroll each row; tap a photo for its story.
The Radnor Township post office opened in 1827, the earliest record of the town by name (U.S. post office records).
How does Radnor Township rank for history?
Radnor Township is more historic than 86% of U.S. towns. 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 Radnor Township?
4 listings: 4 buildings, among them the Lewis, Samuel, Farmhouse (listed 1993, the first).
How old are the homes in Radnor Township?
21% of Radnor Township’s homes were built before 1940 (Census estimate, ±11.2 points), against a typical 15% for an Ohio town; the median home was built in 1980.
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 (6), the National Register of Historic Places (4), Wikipedia, 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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