The governor of Oklahoma is the head of government of the U.S. state of Oklahoma. Under the Oklahoma Constitution, the governor serves as the head of the Oklahoma executive branch, of the government of Oklahoma. The governor is the ex officio commander-in-chief of the Oklahoma National Guard when not called into federal use. Despite being an executive branch official, the governor also holds legislative and judicial powers. The governor's responsibilities include making yearly "State of the State" addresses to the Oklahoma Legislature, submitting the annual state budget, ensuring that state laws are enforced, and that the peace is preserved. The governor's term is four years in length.

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.