The Unadilla Township post office opened in 1834, the earliest record of the town by name. Three smaller post offices, Unadilla (1834), Plainfield (1837) and Bullis (1884), opened inside today’s town and later closed.
2020 census: 3,333192 years
How historic is Unadilla Township?
B
More historic than 56% of U.S. towns, on its age, its old homes and the National Register.
Founding year: the first Unadilla Township post office (Blevins & Helbock, CC0).The full story ↓
History grade
What drives Unadilla Township’s History grade
On its age, its old homes and the National Register, Unadilla Township is more historic than 56% of U.S. towns, #313 of 701 in Michigan. Its age holds the grade up; its National Register listings pull it down.
B
HistoryA character grade: shown, never part of Unadilla Township’s overall grade.
Few Michigan towns list much on the Register (a typical Michigan town has 0.0 per 10,000 residents, the U.S. 2.4), so Unadilla Township’s 0.0 sits below most of its state (32% of Michigan towns have fewer) while its 0 listings outnumber those of 23% 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 (±7.5 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 Unadilla Township’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Bullis Post Officepost officeCarriage Lane AirportairportGregory StationlocalePlainfield Post Officepost officeUnadilla Post Officepost office
4cemeteries and burying grounds inside Unadilla Township
HarfordLivermorePlainfield VillageWilliamsville
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
On the map
Unadilla Township on the map, 1919 to 1996
Every edition of the U.S. Geological Survey’s map of Unadilla Township. Tap a year, or press play to watch the town change.
1919Stockbridge 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 Unadilla Township.
Unadilla was formed by an act of the Legislative Council of the Territory of Michigan on March 26, 1835, and initially included what is now Iosco Township to the north and a portion of Lyndon township in Washtenaw County on the south. The first township meeting was held on the first Monday of April 1835. Since Livingston County government was not organized until 1836, the township was at first attached to Washtenaw County. On March 6, 1838, Iosco Township was set off and with the southern portion being assigned to Lyndon Township, Unadilla assumed its present boundaries.
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.
The Unadilla Township post office opened in 1834, the earliest record of the town by name (U.S. post office records).
How does Unadilla Township rank for history?
Unadilla Township is more historic than 56% of U.S. towns, #313 of 701 in Michigan. 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 Unadilla Township?
14% of Unadilla Township’s homes were built before 1940 (Census estimate, ±7.5 points), against a typical 12% for a Michigan town; the median home was built in 1978.
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, U.S. Geological Survey historical maps, 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.
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