Mignon initially became an incorporated town (according to the 1920 U.S. Census) around 1915, but either disincorporated or lost its charter in the 1930s and did not show on the 1940 U.S. Census. Because (as of 1950) it still was a sizeable community of 3,000 residents, it was listed on the 1950 through 1970 census rolls as an unincorporated community. Beginning in 1980, it received the new status of census-designated place (CDP).
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 Wikipedia, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia) 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.