The Supreme Court of Oklahoma is a court of appeal for non-criminal cases, one of the two highest judicial bodies in the U.S. state of Oklahoma, and leads the judiciary of Oklahoma, the judicial branch of the government of Oklahoma.

The government of the U.S. State of Oklahoma, established by the Oklahoma Constitution, is a republican democracy modeled after the federal government of the United States. The state government has three branches: the executive, legislative, and judicial. Through a system of separation of powers or "checks and balances," each of these branches has some authority to act on its own, some authority to regulate the other two branches, and has some of its own authority, in turn, regulated by the other branches.