A post office called Hartville has been in operation since 1842. The community was settled in the early 19th century, and bears the name of Isaac Hart, a pioneer citizen.
Much of the town was destroyed during the Battle of Hartville in 1863. Lt. Col. John Wimer of the Confederacy, who had served two nonconsecutive terms as mayor of St. Louis, was killed in the battle and was buried at Hartville.
The Grovespring Tornado in 1959 destroyed most of Hartville's business district, including the post office. No major injuries occurred, since a warning alarm had given the citizens time to take cover.
Kelton House was listed on the National Register of Historic Places in 1983.
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 (4), 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.