Founding year: the first Riga Township post office (Blevins & Helbock, CC0).
History grade
What drives Riga Township’s History grade
On its age, its old homes and the National Register, Riga Township is more historic than 58% of U.S. towns. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
B
HistoryA character grade: shown, never part of Riga 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 Riga 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 (±7.6 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 Riga 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 Riga Township yet. The photos, dates and memories neighbors add here are how it gets written.
Riga Township is a civil township of Lenawee County in the U.S. state of Michigan. The population was 1,286 at the 2020 census. The unincorporated community of Riga can be found within the township.
Its first post office opened in 1851. Between the 2010 and 2020 censuses its population fell from 1,406 to 1,286 (-9%).
Intro from Wikipedia. Population: U.S. Census Bureau.
By decade
Riga Township, decade by decade
One decade in the archive so far: the 1900s. Scroll each row; tap a photo for its story.
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 Riga Township post office opened in 1851, the earliest record of the town by name (U.S. post office records).
How does Riga Township rank for history?
Riga Township is more historic than 58% 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.
How old are the homes in Riga Township?
54% of Riga Township’s homes were built before 1940 (Census estimate, ±7.6 points), against a typical 12% for a Michigan town; the median home was built in 1938.
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 (4), 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.
1903
2020
2020
2016