Boris Franzevich Gulko (Russian: Борис Францевич Гулько, IPA: [bɐˈrʲis ɡʊlʲˈko]; born February 9, 1947) is a Soviet-American Grandmaster in chess. His peak Elo rating was 2644 in 2000.
Gulko is noted to be the only person to win both the Soviet Chess Championship and the U.S. Chess Championship, and for having a positive score against Garry Kasparov.