| 2012–13 National League B season | |
|---|---|
| League | National League B |
| Sport | Ice hockey |
| Duration | September 14, 2012 - February 10, 2013 |
| Number of games | 50 |
| Number of teams | 11 |
| Regular Season | |
| Season Champions | HC Ajoie |
| Top scorer |
James Desmarais (HC Ajoie) |
| Playoffs | |
| Swiss champion NLB | |
| Champions | Lausanne HC |
| Runners-up | EHC Olten |
The 2012–13 National League B season was played from September 14, 2012 to February 10, 2013. The regular season was won by HC Ajoie with 105 points.
Lausanne HC will play the losing team of a Play-Out tournament from the National League A for the 12th and final spot in the top division next year.