James Howard Marshall II (January 24, 1905 – August 4, 1995) was an American businessman, academic, attorney, and government official. His life spanned nine decades and almost the entire history of the oil industry. He was involved with and invested in the oil industry via academic, government and commercial endeavors. He owned 16% of Koch Industries. Marshall was married to model and celebrity Anna Nicole Smith during the last 14 months of his life. His estate became the subject of protracted litigation, which was reviewed by the Supreme Court in Marshall v. Marshall and Stern v. Marshall.