1991 Campeonato Nacional Primera División
The 1991 Campeonato Nacional, was the 59th season of top-flight football in Chile. Colo-Colo won its eighteenth title following a 0–0 away draw against Coquimbo Unido on 18 December. Coquimbo Unido, as runner-up, and Universidad Católica, as Liguilla winners, also qualified for the next Copa Libertadores.
Title
Liguilla Pre-Copa Libertadores
Preliminary round
- Qualified as "Best Loser"
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Universidad Católica also qualified for the 1992 Copa Libertadores
Promotion/relegation Liguilla
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Everton and Universidad de Chile will play in the 1992 Primera División