1991 Primera División de Chile
| Dates | 27 April – 22 December 1991 |
|---|---|
| Champions | Colo-Colo (18th title) |
| Relegated | Provincial Osorno Santiago Wanderers |
| 1992 Copa Libertadores | Colo-Colo Coquimbo Unido Universidad Católica (Liguilla winners) |
| 1992 Copa CONMEBOL | O'Higgins (Liguilla 2nd place) |
| Matches played | 240 |
| Goals scored | 658 (2.74 per match) |
| Top goalscorer | Rubén Martínez (23 goals) |
| Biggest home win | Cobresal 8–1 Provincial Osorno (1 December) |
| Highest attendance | 59,610 Universidad Católica 0–2 Colo-Colo (20 October) |
| Total attendance | 1,759,454 |
| Average attendance | 7,331 |
← 1990 1992 → | |
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 .