Francis Preston Blair Lee III (May 19, 1916 – October 25, 1985), popularly known as 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 ever Lieutenant Governor of Maryland from 1971 to 1979, and the first to hold that office in over a century, and served as the Acting Governor of Maryland from 1977 to 1979, during Marvin Mandel's self-imposed suspension of gubernatorial powers and duties.