Cleveland County is a county in the central part of the U.S. state of Oklahoma. The population was 295,528 at the 2020 United States census, making it the third-most populous county in Oklahoma. Its county seat is Norman. The county was named for U.S. President Grover Cleveland.

Central Oklahoma is the geographical name for the central region of the U.S. state of Oklahoma. It is also known by the Oklahoma Department of Tourism designation, Frontier Country, defined as the 12-county region including Canadian, Grady, Logan, Oklahoma, Cleveland, McClain, Payne, Lincoln, Pottawatomie, Seminole, Okfuskee, and Hughes counties.