How Berlin Township came to be
From Wikipedia’s history of Berlin Township.
Berlin Township was organized in 1839 with Alonzo Sessions as the first supervisor.
Text from Wikipedia, licensed CC BY-SA 4.0.
Each edition grades its towns against each other only.
More historic than 81% of U.S. towns. What drives it
Its Register listing is the Sessions Schoolhouse. Below: maps from 1916 on.
The Berlin Township post office opened in 1842, the earliest record of the town by name. Three smaller post offices, Cass (1840), Berlin (1842) and New Berlin (1855), opened inside today’s town and later closed.
More historic than 81% of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, Berlin Township is more historic than 81% of U.S. towns. All 3 inputs are above most U.S. towns; its age ranks highest and its National Register listings lowest.
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 Berlin Township’s 5.5 sits above most of its state (77% of Michigan towns have fewer) while its 1 listings outnumber those of 51% of U.S. towns.
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 →
Read from the archive, the National Register and the record. The page puts what stands out first.
The first neighbors to add old photos shape how Berlin Township’s history is told.
Three other post offices opened and closed inside today’s town.
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Every edition of the U.S. Geological Survey’s map of Berlin Township. Tap a year, or press play to watch the town change.

U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Berlin Township.
From Wikipedia’s history of Berlin Township.
Berlin Township was organized in 1839 with Alonzo Sessions as the first supervisor.
Text from Wikipedia, licensed CC BY-SA 4.0.
Woven from the archive, old maps, post office records, the National Register and the people born here.
On the mapFirst mapped by the U.S. Geological SurveyWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
The country’s official list of buildings and places worth saving.
National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.
Each neighbor’s History grade, on the same three inputs.
The Berlin Township post office opened in 1842, the earliest record of the town by name (U.S. post office records).
Berlin Township is more historic than 81% 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.
One place: the Sessions Schoolhouse (listed 1985).
20% of Berlin Township’s homes were built before 1940 (Census estimate, ±6.0 points), against a typical 12% for a Michigan town; the median home was built in 1973.
What the archives can’t tell you, neighbors can.
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 the National Register of Historic Places (1), Wikipedia, Wikidata and Wikipedia for famous people, 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.

1916Ionia sheet · 1:62,500