The league was formed as a second-tier league in
Czechoslovakia. Before the
dissolution of Czechoslovakia it consisted of 16 teams. Upon dissolution, six teams were promoted to the then newly formed
Slovak First League. The league was expanded to 18 teams in 1996/97 season, but returned back to 16 in 2001/02 and reduced to 12 in 2006–07. The number of teams expanded to 16 from the 2017–18 season. In June 2014 the league signed a two-year sponsorship agreement with a gambling firm, taking the name of
DOXXbet liga as part of the deal. External events prompted adaptive measures, notably during the
COVID-19 pandemic, when all Slovak football leagues, including the 2. Liga, were suspended in March 2020 following government directives to curb virus spread; the 2019–20 season resumed in June without fans, while the 2020–21 campaign featured postponed matches and enhanced health protocols under
SFZ oversight. In February 2024, the league was renamed as
MONACObet LIGA as a part of a two-and-half year partnership deal with an option to extend. The deal included a further undisclosed club grant worth over
€1 million, allegedly exceeding any previous partnerships. ==Current teams (2025–26)==