The area was settled by 120 Norwegian immigrants from Lisbon, Illinois on June 7, 1855; including Osmond and Anna Sheldahl and five of their children. It incorporated as a city on January 18, 1882.
The Chicago and Northwestern Railway established a NE to S rail line through Sheldahl during the 1880s. The Chicago, Milwaukee, St. Paul, and Pacific Railroad connected with this line 2 miles north in Slater. In 2005, Union Pacific Railroad sold a 25-mile discontinued rail corridor—which included the recently abandoned line through Sheldahl—to the Iowa Natural Heritage Foundation, which enabled the construction of the recreational High Trestle Trail. Access to the trail, including a parking area and washroom, is located in Sheldahl.
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 the Library of Congress (1), the National Register of Historic Places (1), Wikipedia, Wikidata and Wikipedia for famous people, 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.