Belt’s post office opened in 1885, and 37% of its homes were built before 1940
2 places in town are on the National Register, among them a historic district with 13 buildings. Below: 1 old photo or paper, maps from 1956 on, and the census since 1910.
Belt was home to Montana's first coal mine. It supplied fuel to Fort Benton. During the coal boom the town was referred to as "Little Pittsburgh", "Coal Banks", or "Black Diamond City". The post office opened on February 2, 1885, with Eugene Clingan as postmaster.
Several talented Finnish carpenters and architects contributed to the growth of the town. Fifteen buildings are included in the Belt Commercial Historic District listing on the National Register of Historic Places.
The Belt Museum is housed in the original town jail, also on the National Register of Historic Places.
When the Great Falls smelters converted from coal to natural gas in 1930, the town's economy lost a significant source of income.
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), the Library of Congress (1), the National Register of Historic Places (2), Wikipedia, Wikidata and Wikipedia for famous people, 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.