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Cartwright is an unincorporated rural community and census-designated place in Bryan County, Oklahoma, United States. As of the 2020 census it had a population of 492.' The post office opened April 25, 1940, and it is one of the newest communities in Bryan County. The ZIP code is 74731. It is named for Congressman Wilburn Cartwright. Cartwright was established because of the construction of Denison Dam when a community of shelters for workmen was erected.
Its first post office opened in 1940. Between the 2010 and 2020 censuses its population fell from 609 to 492 (-19%).
Intro from Wikipedia. Population: U.S. Census Bureau.
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 (3), U.S. Geological Survey historical maps, 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.