The Glen Ullin post office opened in 1883, the earliest record of the town by name. Another post office, Glenullin (1895), opened inside today’s city and later closed.
2020 census: 732143 years
Founding year: the first Glen Ullin post office (Blevins & Helbock, CC0).The full story ↓
What stands out about Glen Ullin’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Glen Ullin was founded in 1883 along the transcontinental route of the Northern Pacific Railway. The name was created by Major Alvan E. Bovay, a Northern Pacific land agent at the time. Glen, the Scottish Gaelic word for "valley," was chosen because of the city's location within a valley, while Ullin was taken from the Thomas Campbell poem Lord Ullin's Daughter. Glen Ullin was originally built up chiefly by Germans from Russia.
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 (12), 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.