Stevens Thomson Mason was an American politician who served as the first governor of Michigan from 1835 to 1840. Coming to political prominence at an early age, Mason was appointed his territory's acting territorial secretary by Andrew Jackson at age 19, becoming the acting territorial governor soon thereafter in 1834 at age 22. As territorial governor, Mason was instrumental in guiding Michigan to statehood, which was secured in 1837. A member of the Democratic Party, he was elected as Michigan's first state governor in 1835, where he served until 1840. Elected at 23 and taking office at 24, Mason was and remains the youngest state governor in American history.

The governor of Michigan is the head of government, and chief executive of the U.S. state of Michigan. The current governor is Gretchen Whitmer, a member of the Democratic Party, who was inaugurated on January 1, 2019, as the state's 49th governor. She was re-elected to serve a second term in 2022. The governor is elected to a four-year term and is limited to two terms.