Liga was the 20th season of the Czech Second Division, the second tier of the Czech football league.
The season began on 4 August 2012 and finished on 5 June 2013.
In addition to the two lowest-placed clubs being relegated, third-placed HFK Olomouc were also relegated due to financial difficulties.
[1] Promoted to Czech First League Relegated to Moravian-Silesian Football League Relegated to Bohemian Football League HFK Olomouc returned to the Czech Second Division after an absence of three seasons.
Relegated from Czech First League Promoted from Bohemian Football League Promoted from Moravian-Silesian Football League Notes: