Wikipedia doesn’t have a history of St. Regis yet. The photos, dates and memories neighbors add here are how it gets written.
St. Regis or Saint Regis is an unincorporated community and census-designated place (CDP) in Mineral County, Montana. The population was 313 at the time of the 2020 census. Pierre-Jean De Smet travelled extensively in this area of Montana. He named the river, after which the town takes its name, after a fellow Jesuit priest. The post office opened in 1896. The Northern Pacific Railway built a railroad through the town in the early 1900's, boosting the economy.
Its first post office opened in 1896. Its population held steady between the last two censuses: 319 in 2010, 313 in 2020.
Intro from Wikipedia. Population: U.S. Census Bureau.
Timeline
St. Regis, 1896 to 1987
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.
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 (6), 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.