On its age, its old homes and the National Register, New Miami is more historic than 44% of U.S. towns. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
C+
HistoryA character grade: shown, never part of New Miami’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 New Miami’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.
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 (±7.5 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 New Miami’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
The United Coke and Gas Company built a number of Otto-Hoffman type coke ovens circa 1905 for the Hamilton Otto Coke Company. The coke plant covered about 50 acres (200,000 m2) with a battery of 120 coke ovens, thus New Miami was referred to as Coke Otto. The property was purchased in 1937 by The American Rolling Mill Company which changed its name to ARMCO in 1948. The company is now AK Steel Holdings in Middletown, Ohio. One of Armco's best-known products may be the crash barriers installed around many auto-racing tracks, particularly in Formula One. These barriers are commonly called "Armco". New Miami was incorporated as a village in 1929.
New Miami is more historic than 44% 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.
How old are the homes in New Miami?
19% of New Miami’s homes were built before 1940 (Census estimate, ±7.5 points), against a typical 15% for an Ohio town; the median home was built in 1960.
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), Wikipedia 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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