Mark Holowesko (born 12 March 1960) is a Bahamian former sailor. He competed in the Star event at the 1996 Summer Olympics.
He began his career in finance working for Sir John Templeton, a fellow Bahamian resident. Mark later started his own hedge fund "Holowesko Partners".
Mark Holowesko is the son of William P Holowesko, a Bahamian American lawyer, and Lynn Pyform.