Biohazard Cleanup Near Riverview Estates Newcastle, OK

Newcastle is a city in McClain County, Oklahoma, just south of Oklahoma City, and it is the largest incorporated community in McClain County.

Newcastle began on March 26, 1894, with the opening of a post office in the Chickasaw Nation serving a community of just 25 people; its earliest residents included Choctaw and Chickasaw citizens and those who had married into the tribes.

Newcastle incorporated on January 18, 1962, as "South Newcastle," largely to protect its land as Oklahoma City began annexing territory across the Canadian River, and it shortened its name to Newcastle in 1965.

The incorporated city sprawls across more than 60 square miles of northern McClain County.

Newcastle is one of Oklahoma's fastest-growing cities: its population rose from 1,271 in 1970 to 5,434 in 2000 and 10,984 at the 2020 census, and the Census Bureau estimated it at 14,677 by 2024.

Newcastle anchors the fast-growing "Tri-City Area" of northern McClain and Grady counties, together with neighboring Tuttle and Blanchard.

The city has been struck by major tornadoes in three different decades: the May 3, 1999 Bridge Creek–Moore F5 tornado destroyed homes inside the Newcastle city limits.

On May 24, 2011, another tornado damaged or destroyed an estimated 160 homes and more than 20 businesses in Newcastle, though no lives were lost within the city.

On May 20, 2013, a violent tornado damaged parts of Newcastle, including the historic Ozark Trail bridge, before crossing the Canadian River into Moore.

Newcastle's public school district has grown with the city and at the end of the twentieth century was already the community's largest employer.