|Occupation||Oil industry executive|
|Family||J. Howard Marshall (grandfather)
E. Pierce Marshall (father)
Elaine Tettemer Marshall (mother)
Preston Marshall is an American oil industry executive. He serves as the president of Maropco and as the president and CEO of Rusk Capital Management. He is the son of E. Pierce Marshall and Elaine Tettemer Marshall, and the grandson of J. Howard Marshall. Marshall serves on the boards of directors for the Institute for Energy Research, the Cato Institute, and the Petroleum Club of Houston.