- Source of Wealth: Business
- Age: 79
- Marital Status: Married (Bridget Rooney)
- Full Name: William Ingraham Koch
- Nationality: American
- Date of Birth: May 3, 1940
- Occupation: Businessman, Sailor, Collector
- Education: Massachusetts Institute of Technology
- Children: 1 (Wyatt)
William Koch is the son of the largest privately owned oil refining company in the United States. After leaving the Koch Industries founded by his father Fred Chase Koch, William Koch went on to establish and head the Oxbow Group, a Florida-based energy development holding company.
Koch is known to be an avid collector of wines, arts, and maritime memorabilia. His collection of maritime memorabilia includes antique nautical instruments, model shops and paintings of seascapes and ships. Koch also owns a collection of military vehicles which include an M42 Duster Antiaircraft gun. William Koch has an estimated net worth of over $4.05 billion.