Newcastle, OK Newcastle is a city in McClain County, Oklahoma, United States, and part of the Oklahoma City Metropolitan Area. Newcastle became a dot on the map with the opening of a new post office March 26, 1894 and a population of 25. Newcastle lay in the Chickasaw Nation. The community’s first residents included Choctaw, Chickasaw, and individuals who had married into those tribes. Many were involved in ranching. By 1907, the community had a subscription school, a cotton gin, two stores, and two blacksmiths.
City Established: 1962
In January 2019, Newcastle was ranked 36th “Best City to Live” in the United States by 24/7 Wall St., which created a weighted index of over two dozen measures to identify the best city to live in each state.
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