Karl Johan Marcus Vinnerborg (born 8 August 1972) is a Swedish professional ice hockey referee, currently working in the Swedish Hockey League—Sweden's premier ice hockey league—and with the International Ice Hockey Federation (IIHF).
Vinnerborg has won Guldpipan (English: the gold whistle) three times, awarded to the premier official in Elitserien as voted by the players.
Vinnerborg has officiated at seven IIHF sanctioned events, among them four consecutive World Championships between 2006—2009, and at the 2010 Olympics.