2012 Campeonato Nacional Primera División
The 2012 Primera División del Fútbol Profesional Chileno season was 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
Format changes
For the 2012, the ANFP's Council of Club Presidents approved the return to the Apertura and Clausura format, with playoffs.Teams
Eighteen teams competed in the Primera División for the 2012 season, sixteen of whom returned 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. In 2012, the Santiago Wanderers celebrated their 120th season since the teams founding in 1892.Torneo Apertura
The Torneo Apertura began in January and will ended on July 2.Classification stage
The Classification Stage began in January and ended in July.Standings
Playoff stage
Quarterfinals
In the quarterfinals, the 1 seed play the 8 seed, the 2 seed play the 7 seed, the 3 seed play the 6 seed, and the 4 seed play the 5 seed.----
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Semifinals
In the semifinals, the highest seed play the lowest seed, and the second-highest seed play the second-lowest seed.----
Universidad de Chile won 4–2 on aggregate.
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''2–2 on aggregate. O'Higgins won on away goals rule.''
Finals
----''3–3 on aggregate. Universidad de Chile won on penalties.''
Torneo Clausura
The Torneo Clausura began in July and will end in December.Classification stage
Standings
Playoff stage
Quarterfinals
Colo-Colo won 6–5 on aggregate.----
Unión Española won 4–1 on aggregate.
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Huachipato won 3–2 on aggregate.
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''Rangers won 2–0 on aggregate.''
Semifinals
Unión Española won 5–1 on aggregate.----
''Huachipato won 2–1 on aggregate.''
Finals
''4–4 on aggregate. Huachipato won 3–2 on penalties.''Aggregate table
Relegation/promotion playoffs
Everton won 4–1 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.''