Most of Delaplaine was built recently: 0.0% of its homes predate 1940 and the median home dates from 1990. Below: maps from 1940 on and the census since 1920.
The Delaplaine post office opened in 1875, the earliest record of the town by name. Wikidata gives 1912. Two smaller post offices, Grays Station (1872) and De La Plaine (1875), opened inside today’s town and later closed.
First census: 152 in 19202020 census: 64151 years
Founding year: the first Delaplaine post office (Blevins & Helbock, CC0). Wikidata: 1912.The full story ↓
What stands out about Delaplaine’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
A French trading post may have operated at the current site of Delaplaine prior to the Louisiana Purchase in 1803. The name is French for "of the plain," and was written as three words (De La Plaine) for many years. When the St. Louis, Iron Mountain and Southern Railway constructed a line through the area in the 1870s, a stop known as "Grey's Station" was established, named for one of the few female postmasters in the state at the time, Lizzie Grey. The town reverted to the name "Delaplaine" in 1875. Delaplaine incorporated in 1912.
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), 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.