The 2012-13 Slovenian Hockey League season was the 22nd season of the Slovenian Hockey League, the top level of ice hockey in Slovenia. Three teams participated in the regular season, which was won by HD mladi Jesenice. For the playoffs, the three teams from the regular season were joined by HDD Olimpija Ljubljana, which had participated in the Erste Bank Eishockey Liga during the regular season, and HK Triglav and HK Slavija Ljubljana, which had both played in the Inter-National League during the regular season. HDD Olimpija Ljubljana won the playoff championship by defeating HK Slavija Ljubljana in the final.