Founding year: Wikidata. First post office: 1854.The full story ↓
History grade
What drives Ada’s History grade
On its age, its old homes and the National Register, Ada is more historic than 58% of U.S. towns, #556 of 993 in Ohio. Its share of homes from before 1940 holds the grade up; its age pulls it down.
B
HistoryA character grade: shown, never part of Ada’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 Ada’s 2.1 sits near the middle of its state (53% of Ohio towns have fewer) while its 1 listings outnumber those of 51% 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 is a Census survey estimate (±6.8 points). Two sources give 1853.
Founding year: Wikidata (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 Ada’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
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.
Fire insurance maps drew every building, what it was made of and what it was used for, so insurers could price the risk of fire. Pick a year, then a sheet.
Following the 1817 Treaty of Fort Meigs, the Shawnee Indians held reservation land at Hog Creek near Ada. Ada itself was originally called Johnstown, platted in 1853 by S. M. Johnson when the railroad was extended to that point. When a post office was established it was called Ada Post Office, named after the postmaster's daughter, Ada. The post office has been in operation since 1854.
The growth of the village is due in large part to the founding of the Ohio Normal School, now known as Ohio Northern University. The university was founded in 1871 by Henry Solomon Lehr, just eighteen years after Ada was first settled. Today, Ada is the second largest incorporated community in Hardin County.
Passages that mention Ada, cut from the printed page as they were published.
The history of Hardin county, Ohio1883 · page 729Read the page →
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Methodist Episcopal Church of Ada. — At quite an early day a class was organized at the Sleichter Schoolhouse, where they held meetings for several years, but about 1853, the town of Ada having been laid out and a little village started. Rev. Jacjob Fechtley held a meeting at the old schoolhouse of said village, and organized a class embracing some of the members of the former class, and others, as follows: Eli Pugh, Eli Newman and wife, daughter and son, Judge Simon’s wife, George McElroy and wife, Jane Lynch and probably a few others. Services were then held in the
Text read by machine from the scan; it may contain errors.
A twentieth century history of Hardin County, Ohio1910 · page 424Read the page →
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Libehtv Township has eight good rural schools, not counting the public schools of Ada. They are as follows: McElro.y, situated two miles east and two north of Ada; Rinehart, two miles north of Ada; Woods, two miles west and two north of Ada; Scott’s Crossing, two miles east of Ada; Hosier, two miles west of Ada; Hoon, two miles south of Ada; Klingler, two miles south and two west of Ada, and the Mustard school, two miles east and two miles south of the city.
Text read by machine from the scan; it may contain errors.
The history of Hardin county, Ohio1883 · page 999Read the page →
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Dobbins came to Ada, he bought a tract of land, now inside the corporation of Ada, and laid it out in what is known as Dobbins’ First and Second Additions to Ada. His residence is very pleasantly situated on the corner of Normal and South Hilbert streets.
Text read by machine from the scan; it may contain errors.
A twentieth century history of Hardin County, Ohio1910 · page 197Read the page →
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About 1850 William I\fit(diell. a resident of Ft. Wayne, Indiana, bought a 160 acre tract of timber land that is now largely covered by the village of Ada. The Ohio and Indiana railroad, later the Pittsburg, Ft. Wayne and Chicago, and now a part of the great Pennsylvania system, was pushing westward, active construction through this immediate region beginning almut 1852. In 1853 l\Ir. IMitehell induced S. M. Johnson to come to tliis land and locate a saw mill, and with his coming Ada sprang into life. The shipment of lumber, staves and head-
Text read by machine from the scan; it may contain errors.
Scans and text from the Internet Archive. Books published in 1930 or earlier, which are in the public domain.
Timeline
Ada, 1853 to 1990
Woven from the archive, old maps, post office records, the National Register and the people born here.
In 1853, according to Wikidata. Ada’s post office opened in 1854, and the census of 1880 counted 1,760 people here.
How does Ada rank for history?
Ada is more historic than 58% of U.S. towns, #556 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 Ada?
One place: the Ada Pennsylvania Station and Railroad Park (listed 1998).
How old are the homes in Ada?
23% of Ada’s homes were built before 1940 (Census estimate, ±6.8 points), against a typical 15% for an Ohio town; the median home was built in 1973.
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 (16), the Library of Congress (1), Wikidata (1), 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), the USGS Geographic Names Information System, Sanborn fire insurance maps (Library of Congress) 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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