Jagna Marczułajtis (born December 15, 1978) is a Polish snowboarder who competes in parallel slalom and parallel giant slalom. Her best finishes in the World Cup in parallel slalom are two 1st places: in January of 2006 in Nendaz and in January of 2004 in Bad Gastein. She competed for Poland in three Olympic Games: Nagano 1998, Salt Lake City 2002 (where she placed 4th), and Turin 2006. She is the former wife of fellow Polish Olympian, figure skater Sebastian Kolasiński. She was born and lives in Zakopane, Poland with her daughter Jagoda Olimpia.