Marvin Pierce Bush (born October 22, 1956) is the youngest son of U.S. President George H. W. Bush and Barbara Pierce, and brother of President George W. Bush, John (Jeb), Neil and Dorothy. He and wife Margaret Conway (née Molster) have two children who were adopted from the Gladney Center in Ft. Worth, Texas: a daughter, Marshall, and a son, Walker.
 
Marvin Bush attended Woodberry Forest School. He obtained a B.S. degree from the University of Virginia, where he became a member of the Delta Phi Fraternity, or St. Elmo Hall. He spent most summers and holidays at the Bush family estate.

He is a former director of HCC Insurance Holdings. HCC, formerly Houston Casualty Company, is a publicly traded insurance company on the New York Stock Exchange. He appears in the 2008 award-winning documentary on Lee Atwater,Boogie Man: The Lee Atwater Story.