| Competition: | Campeonato Nacional 1985 |
| Dates: | 11 May 1985 – 5 January 1986 |
| Winners: | Cobreloa (3rd title) |
| Relegated: | Deportes Arica O'Higgins |
| Matches: | 380 |
| Total Goals: | 955 |
| Continentalcup1: | 1986 Copa Libertadores |
| Continentalcup1 Qualifiers: | Universidad Católica (Liguilla winners) Cobresal (Playoff winners) |
| League Topscorer: | Ivo Basay (19 goals) |
| Highest Attendance: | 61,161 |
| Attendance: | 1,857,794 |
| Average Attendance: | 4,889 |
| Prevseason: | 1984 |
| Nextseason: | 1986 |
The 1985 Campeonato Nacional was Chilean football league top tier's 53rd season. Cobreloa was the tournament's champion, winning its third title.[1]
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Played between 1985 League champions and 1984 League runners-up.Cobresal qualified for the 1986 Copa Libertadores