| Competition: | Segunda División |
| Season: | 1984 |
| Winners: | Unión La Calera |
| League Topscorer: | Luis Martínez (28 goals) Curicó Unido |
| Prevseason: | 1983 |
| Nextseason: | 1985 |
The 1984 Segunda División de Chile was the 33rd season of the Segunda División de Chile.
Unión La Calera was the tournament's champion.[1]