Poston’s post office opened in 1949, and 1 of its places is on the National Register
Most of Poston was built recently: 0.0% of its homes predate 1940 and the median home dates from 1977.
How Poston began
When was Poston founded?
The Poston post office opened in 1949, the earliest record of the town by name.
1 historic place in Poston
The country’s official list of buildings and places worth saving. One is a National Historic Landmark, the highest tier.
All 1 listings
National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.
Lost post offices and places now gone
Poston had its own post office from 1949 to 1960.
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Questions about Poston’s history
What year was Poston founded?
The Poston post office opened in 1949, the earliest record of the town by name (U.S. post office records).
What is on the National Register in Poston?
One place: the Poston Elementary School, Unit 1, Colorado River Relocation Center (listed 2012).
Memory lane
What the archives can’t tell you, neighbors can.
Where this page comes from
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 the National Register of Historic Places (1), 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.