Cartwright is an unincorporated rural community and census-designated place in Bryan County, Oklahoma, United States. As of the 2010 census it had a population of 609. 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. Overview In Cartwright for the years 2010–2014, the median household income is $27,212 and the median house value is $101,500. The median year that a house in Cartwright was built is 1983. Cartwright's population density is ; whites make up 78.49% of the total population. The average temperature of Cartwright is . References Further reading Shirk, George H. Oklahoma Place Names. Norman: University of Oklahoma Press, 1987. . Census-designated places in Bryan County, Oklahoma Census-designated places in Oklahoma