| Dates: | 7 May 1966 – 15 January 1967 |
| Winners: | Universidad Católica (4th title) |
| Relegated: | Ferrobádminton |
| Matches: | 306 |
| Total Goals: | 933 |
| Continentalcup1: | 1967 Copa Libertadores |
| Continentalcup1 Qualifiers: | Universidad Católica Colo-Colo |
| League Topscorer: | Carlos Campos (21) Felipe Bracamonte (21) |
| Highest Attendance: | 77,890 |
| Attendance: | 2,751,770 |
| Average Attendance: | 8,992 |
| Prevseason: | 1965 |
| Nextseason: | 1967 |
The 1966 Campeonato Nacional de Fútbol Profesional, was the 34th season of top-flight football in Chile. Universidad Católica won their fourth title following a 4–2 win against Unión San Felipe on the 32nd matchday, also qualifying for the 1967 Copa Libertadores.[1]
| Name | Team | Goals | |
|---|---|---|---|
 Felipe Bracamonte | Unión San Felipe | 21 | |
| Carlos Campos | Universidad de Chile | 21 |