Frohna’s post office opened in 1870, and 19% of its homes were built before 1940
Its Register listing is the Christian A. Bergt Farm. Its Register listing is the Christian A. Bergt Farm. Below: maps from 1925 on and the census since 1880.
Frohna is one of seven towns and villages in the area founded by German immigrants in 1839. Frohna and the others -- Altenburg, Dresden, Johannisberg, Paitzdorf, Seelitz, and Wittenberg—were all named by settlers for towns in the Saxony region of their native country.
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 (10), Wikidata (1), the National Register of Historic Places (1), Wikipedia, Wikidata and Wikipedia for famous people, 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.