East Central University is a public university in Ada, Oklahoma. It is part of Oklahoma's Regional University System. Beyond its flagship campus in Ada, the university has courses available in McAlester, Shawnee, and Durant, as well as online courses. Founded as East Central State Normal School in 1909, its present name was adopted in 1985. Some of its more prominent alumni include former Microsoft COO B. Kevin Turner, Modernist painter Leon Polk Smith, former NFL player Mark Gastineau, past governors Robert S. Kerr and George Nigh, former U.S. Representative Lyle Boren, Oklahoma Supreme Court Justice Tom Colbert, and U.S. Army General James D. Thurman.

Ada is a city in and the county seat of Pontotoc County, Oklahoma, United States. The population was 16,481 at the 2020 United States Census. The city was named for Ada Reed, the daughter of an early settler, and was incorporated in 1901. Ada is home to East Central University, and is the capital of the Chickasaw Nation. Ada is an Oklahoma Main Street City, an Oklahoma Certified City, and a Tree City USA member.