Chapin was platted in 1858 by Josiah Bushnell Grinnell, who had previously founded Grinnell, Iowa. He gave this new town the name Chapin, the maiden name of his wife.
The original townsite was established two miles from the original townsite; when the railroad bypassed the community, Chapin was moved. The new site, originally called New Chapin, was established on July 29, 1871. The original townsite died, and New Chapin dropped the "New" in its name, becoming just "Chapin".
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 Wikipedia, U.S. Geological Survey historical maps, 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.