Blaž Medvešek (born July 10, 1980 in Maribor) is a former backstroke swimmer from Slovenia, who competed for his native country of Slovenia at the 2004 Summer Olympics in Athens, Greece as well as at 2000 Summer Olympics in Sydney, Australia. In his swimming career, he has represented Branik, Maribor and Ilirija, Ljubljana Swimming Clubs and achieved highest achievements while training in Ljubljana with coach Dimitrij Mancevič and team mate Peter Mankoč. The highest achievements include (chronologically):