George Mraz was a Czech-born American jazz bassist and alto saxophonist. He was a member of Oscar Peterson's group, and worked with Pepper Adams, Stan Getz, Michel Petrucciani, Stephane Grappelli, Tommy Flanagan, Jimmy Raney, Chet Baker, Barry Harris, Joe Henderson, John Abercrombie, John Scofield, and Richie Beirach, among others.