Francis Preston Blair Lee III was an American Democratic politician. He served as the secretary of State of Maryland from 1969 to 1971. He was the second lieutenant governor of Maryland from 1971 to 1979 and as such, was the acting governor of Maryland from 1977 to 1979, during Marvin Mandel's self-imposed suspension of gubernatorial powers and duties.

The lieutenant governor of Maryland is the second highest-ranking official in the executive branch of the state government of Maryland in the United States. The officeholder is elected on the same ticket as the governor of Maryland and must meet the same qualifications.