A lieutenant governor, lieutenant-governor, or vice governor is a high officer of state, whose precise role and rank vary by jurisdiction. Often a lieutenant governor is the deputy, or lieutenant, to or ranked under a governor — a "second-in-command", rather like deputy governor. In Canadian provinces or in the Dutch Caribbean, the lieutenant governor is the representative of the monarch in that jurisdiction.
In the United States, lieutenant governors are usually second-in-command to a state governor, and the actual power held by the lieutenant governor varies greatly from state to state. The lieutenant governor is often first in line of succession to the governorship, and acts as governor when the governor leaves the state or is unable to serve. Also, the Lt. Governor is often the president of the state senate.