Rosalie was platted in 1906 when the Chicago, Burlington & Quincy Railroad was extended to that point.
Rosalie was named for Rosalie La Flesche Farley, a daughter of Joseph La Flesche, the last principal chief of the Omaha tribe selected by traditional means in the nineteenth century, and the only chief of part-European ancestry. After the tribe moved onto the reservation, Rosalie La Flesche became its financial manager, managing grazing leases and other transactions. She married Edward Farley of Bancroft, Nebraska. One of her sisters was the author and activist Susette "Bright Eyes" LaFlesche, who married journalist Thomas Tibbles. Another sister was Susan LaFlesche Picotte, a physician who married a Yankton Sioux man.
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). How TownRatings grades history →
From Wikimedia Commons (17), Wikipedia, 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.