Mitja Mežnar (born June 30, 1988) is a Slovenian ski jumper who has competed since 2003. At the 2010 Winter Olympics in Vancouver, he finished eighth in the team large hill and 29th in the individual large hill events.
At the FIS Nordic World Ski Championships 2009 in Liberec, Mežnar finished eighth in the team large hill, 31st in the individual normal hill, and 47th in the individual large hill events.
His best World Cup finish was fifth in the team large hill event in Finland in March 2010.