The Casstown post office opened in 1846, the earliest record of the town by name. Another post office, Lost Creek (1831), opened inside today’s town and later closed.
First census: 394 in 18502020 census: 270180 years
Founding year: the first Casstown post office (Blevins & Helbock, CC0).The full story ↓
What stands out about Casstown’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Casstown was originally called Trimmensburgh, and under the latter name was laid out in 1832 by one Mr. Trimmens, and named for him. The present name honors Lewis Cass, an American military officer, politician, and statesman. A post office called Casstown has been in operation since 1846.
Every edition of the U.S. Geological Survey’s map of Casstown. Tap a year, or press play to watch the town change.
1914Troy 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 Casstown.
From the old history books
What they wrote about Casstown, 1880–1909
Passages that mention Casstown, cut from the printed page as they were published.
Centennial history. Troy, Piqua and Miami county, Ohio1909 · page 109Read the page →
Read the text
Casstown. The only municipality within the boundaries of Lost Creek Township is the village of Casstown. It was laid out in 1832 by Levi Trimmens. It was first called Trimmensburg, but the name not suiting the iirst inhabitants it was changed to Casstown, being the only postoffice of that name in the United States. Cass-
Text read by machine from the scan; it may contain errors.
The History of Miami County, Ohio1880 · page 396Read the page →
Read the text
build’.ngs were mostly log structures, and poor affairs at the best ; but now a substantial brick building graces every district, and the school furniture is of the latest pattern and cannot be excelled. In Special District No. 1, which includes the village of Casstown, a large and handsome brick building has been erected within the past few years. In this a thorough graded school is kept nine mouths of the year, and the result is that it ranks among the best schools in the county.
Text read by machine from the scan; it may contain errors.
The History of Miami County, Ohio1880 · page 398Read the page →
Read the text
Mitchell now lives [t. e. the present Hvatt farm — Ed.], and subsequently built a cabin there. He afterward exchanged it for a quarter-section then owned by Richard Palmer, my brother-in-law, and now owned by* George Hammon and Joel Burton, adjoining the village of Casstown. “ In the latter part of the winter of 1813, 1 volunteered as a soldier, expecting to go to Detroit. But the surrender of Hull’s army there, left our whole northern and northwestern frontier exposed to Indian depredations. The general Government, therefore, caused a line of block-houses to be built along the frontier of Ohio
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
Casstown, 1831 to 1914
Woven from the archive, old maps, post office records, the National Register and the people born here.
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). How TownRatings grades history →
From Wikimedia Commons (12), the National Register of Historic Places (1), Wikipedia, 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 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.