The town of Armstrong began along the route of the Missouri-Kansas-Texas Railroad (Katy) in 1872. At the time of Armstrong's founding it was located in Blue County of the Choctaw Nation. The town had a post office in 1882–3, but thereafter the mail was sent to Caddo. In 1896, another post office opened in Armstrong, but it was closed in 1920. The post office was located in the only grocery store, and the store owner was also the postmaster. In 1911, the population was 41.
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.