Diehlstadt was platted in 1868. The original plat of Diehlstadt filed on June 15, 1870, consisted of 40 acres. The community of Diehlstadt was founded by Tennessee-born John Kirkpatrick (1829-1903) who was one of the community's first merchants and served as Diehlstadt's postmaster between May 11, 1876, and July 30, 1890. The community was named after one H. J. Deal (also spelled Diehl), a German merchant, with the German-language suffix "stadt" meaning town. A post office called Diehlstadt was established in 1870, and remained in operation until 1977.
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, 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.