Martin Marinčin born 18 February 1992 is a Slovak professional ice hockey defenceman currently playing for the Toronto Maple Leafs in the National Hockey League (NHL). He was drafted in the second round, 46th overall, by the Edmonton Oilers in the 2010 NHL Entry Draft.
Marinčin was chosen to play for Slovakia at the 2011 World Junior Championships. During a game against the United States, he was ejected for a hit to the head on forward Jason Zucker. This ejection carried an automatic one-game suspension, and after a review of the play, Marinčin was suspended for an additional three games.
Marinčin was named to the Slovak senior team to compete at the 2014 Winter Olympics in Sochi.