| Competition: | Primera B de Chile |
| Season: | 2011 Primera B |
| Winners: | Deportes Antofagasta |
| Prevseason: | 2010 |
| Nextseason: | 2011-C |
The 2011 Torneo Apertura was part of the 61st completed season of the Primera B de Chile.
Deportes Antofagasta was tournament's champion.[1]