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Newcastle, OK is the largest city in McClain County and among the top 10 fastest growing cities in Oklahoma
Newcastle is big. So big, in fact, that it was listed among the Top 10 fastest growing cities in Oklahoma. It's had a population increase of over 40% since 2000. This kind of expansion has had an ongoing role in Newcastle's history: in 1960, Newcastle only consisted of a few square miles of land, and Oklahoma annexed chunks of land, thus starting Newcastle's expansion. With a population of 7,685, Newcastle is the largest city in Oklahoma's McCain County. Many people are happy with Newcastle living, and you could be one of them should you decide to move here and make this place your new home. View Newcastle City Guide