| Competition: | Campeonato Nacional Petrobras |
| Season: | 2012 |
| Winners: | Apertura: Universidad de Chile Clausura: Huachipato |
| Relegated: | Universidad de Concepción Unión San Felipe Deportes La Serena |
| Continentalcup1: | 2013 Copa Libertadores |
| Continentalcup1 Qualifiers: | Universidad de Chile Huachipato Iquique |
| Continentalcup2: | 2012 Copa Sudamericana |
| Continentalcup2 Qualifiers: | O'Higgins Iquique |
| Continentalcup3: | 2013 Copa Sudamericana |
| Continentalcup3 Qualifiers: | Colo-Colo |
| League Topscorer: | A: Emanuel Herrera, Sebastián Ubilla and Enzo Gutiérrez (11 goals each) C: Sebastián Sáez (13 goals) |
| Prevseason: | 2011 |
| Nextseason: | 2013 |
The 2012 Primera División del Fútbol Profesional Chileno season (known as the 2012 Campeonato Nacional Petrobras for sponsorship reasons) is the 81st season of top-flight football in Chile. Universidad de Chile is the defending champion. Universidad de Chile won both the Apertura and the Clausura Championships
For the 2012, the ANFP's Council of Club Presidents approved the return to the Apertura and Clausura format, with playoffs.[1]
Eighteen teams will be competing in the Primera División for the 2012 season, sixteen of whom are returning from the 2011 season. Santiago Morning and Ñublense were relegated last season after finishing 17th and 18th overall, respectively. There were replaced by Antofagasta and Rangers, the 2011 Primera B winner and runner-up, respectively.
See main article: 2012 Torneo Apertura (Chile). The Torneo Apertura began in January and will end on July 2.
The Classification Stage began in January and ended in July.
See main article: 2012 Torneo Clausura (Chile). The Torneo Clausura began in July and will end in December.
| Teams | Scores | Tie-breakers | |||||
|---|---|---|---|---|---|---|---|
| Team #1 | Team #2 | 1st leg | 2nd leg | ||||
| Universidad de Concepción | 0:6 | Everton | 0–1 | 1–3 | — | — | |
| Cobresal | 3:3 | Barnechea | 1–3 | 3–0 | +1:–1 | — | |
Everton won 4–3 on aggregate and is promoted to Primera División. Universidad de Concepción is relegated to Primera B.----Cobresal won 4–3 on aggregate and remains in Primera División. Barnechea remains in Primera B.