Founding year: the first Osseo post office (Blevins & Helbock, CC0).
History grade
What drives Osseo’s History grade
On its age, its old homes and the National Register, Osseo is more historic than 38% of U.S. towns. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
C+
HistoryA character grade: shown, never part of Osseo’s overall grade.
Wisconsin towns list more on the Register than most of the country (a typical Wisconsin town has 3.0 per 10,000 residents, the U.S. 2.4), so Osseo’s 0.0 sits below most of its state (28% of Wisconsin 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 (±4.0 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 Osseo’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 Osseo yet. The photos, dates and memories neighbors add here are how it gets written.
Osseo ( OSS-ee-oh) is a city located in Trempealeau County, Wisconsin, United States, at the confluence of the North and South Forks of the Buffalo River. The population was 1,811 at the 2020 census.
Its first post office opened in 1867. Between the 2010 and 2020 censuses its population grew from 1,701 to 1,811 (+6%).
Intro from Wikipedia. Population: U.S. Census Bureau.
From the old history books
What they wrote about Osseo in 1917
Passages that mention Osseo, cut from the printed page as they were published.
History of Trempealeau County, Wisconsin1917 · page 148Read the page →
Read the text
An early Irish settler of the northern part of the county was William Henry, who settled in the town of Sumner in 1854. He is now alive and living with his son, E. J. Henry. Michael Merty settled in the town of Sumner in 1859, and died about 1884. Another Irishman of Osseo was Charles Shores, who was well known by the people of the county during the '70s and '80s. He ran a store for some time in the village of Osseo.
Text read by machine from the scan; it may contain errors.
History of Trempealeau County, Wisconsin1917 · page 202Read the page →
Read the text
After the organization of the town of Sumner the voters at the settlement had come to Osseo to vote. At a town meeting the men of the settlement asserted their right to share in the town meeting, which was fair. So in, I forget what year, a vote was taken, the west town meeting in the school house at the settlement, and carried. Accordingly, in either 1862 or 1863, the town meeting was held at the settlement. All went off well, though the proceedings were rather monotonous, there being so few voters, until the annual business meeting was called, when a quarrel arose between
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
Osseo, 1867 to 1980
Woven from the archive, old maps, post office records, the National Register and the people born here.
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 Osseo post office opened in 1867, the earliest record of the town by name (U.S. post office records).
How does Osseo rank for history?
Osseo is more historic than 38% 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 Osseo?
17% of Osseo’s homes were built before 1940 (Census estimate, ±4.0 points), against a typical 12% for a Wisconsin town; the median home was built in 1975.
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 Library of Congress (5), 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.
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