In 1879, the U.S. Government gave 621 acres of land to the Northern Pacific Railway, and part of this became Ypsilanti Township and the townsite of Ypsilanti.
The townsite of Ypsilanti was platted by William Hartley Colby and a partner by the name of Lloyd DePuy. W.H. Colby had come from Ypsilanti, Michigan, so he named the new townsite after the Michigan city by that name.
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), Wikipedia and U.S. Geological Survey historical maps. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.