The Folsom post office opened in 1888, the earliest record of the town by name. Another post office, Capulien (1883), opened inside today’s town and later closed.
First census: 484 in 19102020 census: 51138 years
Founding year: the first Folsom post office (Blevins & Helbock, CC0).The full story ↓
What stands out about Folsom’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Folsom gives its name to the nearby type site for the Folsom Tradition, a Paleo-Indian cultural sequence dating to between 11000 and 8000 BC. The Folsom site, about 8 miles west of the village, was excavated in 1926, and found to have been a marsh-side kill site or camp where 23 bison had been killed using distinctive tools, known as Folsom points.
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 (12), the National Register of Historic Places (1), Wikipedia, 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.