The town was founded in 1888 during a period of thriving logging industry in the Wisconsin northern woods. At that time the railroad was the main means of transporting logs from Dunbar to the southern part of the state and Illinois. Dunbar was probably named after Warren Dunbar (1840–1918), who was an engineer for the railroad.
A story says that before the town was officially founded there was a restaurant where a cook with the surname Dunbar worked. Whenever the railroad stopped at that part of the area they brought food and supplies for the restaurant. The railroad workers said they were bringing things "to Dunbar" the cook. Eventually when the town was founded it was after the cook's surname.
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 (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.