The Slovenian Second Football League (Slovene: Druga slovenska nogometna liga), also known by the abbreviation 2.

In 1992, a unified league was formed, with 16 clubs playing the round-robin system, which lasted until 2003.

In 2003, the league was reduced to twelve teams, and only the champion was directly promoted to the top tier, as an additional promotion play-off was introduced for the second-placed team.

In 2005, the league was further reduced to ten teams playing a triple round-robin format.

The winner is promoted to the Slovenian PrvaLiga, the second-placed team enters the promotion play-offs, and the bottom two teams are relegated to the Slovenian Third League.