The Marengo Township post office opened in 1832, the earliest record of the town by name. Three smaller post offices, Marengo (1832), Johnson (1837) and Tokio (1897), opened inside today’s town and later closed.
First census: 1,860 in 19602020 census: 2,205194 years
How historic is Marengo Township?
A−
More historic than 80% of U.S. towns, on its age, its old homes and the National Register.
Founding year: the first Marengo Township post office (Blevins & Helbock, CC0).
History grade
What drives Marengo Township’s History grade
On its age, its old homes and the National Register, Marengo Township is more historic than 80% of U.S. towns. All 3 inputs are above most U.S. towns; its age ranks highest and its National Register listings lowest.
A−
HistoryA character grade: shown, never part of Marengo 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 Marengo Township’s 4.1 sits above most of its state (74% of Michigan 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 B+ to A−. The pre-1940 share is a Census survey estimate (±5.8 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 Marengo Township’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Wikipedia doesn’t have a history of Marengo Township yet. The photos, dates and memories neighbors add here are how it gets written.
Marengo Township is a civil township of Calhoun County in the U.S. state of Michigan. It is part of the Battle Creek, Michigan Metropolitan Statistical Area. As of the 2020 census, the township population was 2,205.
Its first post office opened in 1832. Its population held steady between the last two censuses: 2,213 in 2010, 2,205 in 2020.
Intro from Wikipedia. Population: U.S. Census Bureau.
By decade
No old photos in the archives yet
Weddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
Be the first to add onePhotograph a print flat, in daylight, no flash.
Every edition of the U.S. Geological Survey’s map of Marengo Township. Tap a year, or press play to watch the town change.
1921Marshall 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 Marengo Township.
On the National Register
1 historic place in Marengo Township
The country’s official list of buildings and places worth saving.
The Marengo Township post office opened in 1832, the earliest record of the town by name (U.S. post office records).
How does Marengo Township rank for history?
Marengo Township is more historic than 80% 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.
What is on the National Register in Marengo Township?
One place: the 23 Mile Road-Kalamazoo River Bridge (listed 1999).
How old are the homes in Marengo Township?
19% of Marengo Township’s homes were built before 1940 (Census estimate, ±5.8 points), against a typical 12% for a Michigan 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 Wikidata (1), the National Register of Historic Places (1), 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) 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.
