1984–85 ACB season
| ACB Primera División | |
|---|---|
| Season | 1984–85 | 
| Games played | 258 | 
| Teams | 16 | 
| Regular season | |
| Relegated | Caja Ronda Lucky Canarias Collado Villalba  | 
| Finals | |
| Champions | Real Madrid 2nd ACB title 24th Spanish title  | 
| Runners-up | Ron Negrita Joventut | 
| Semifinalists | FC Barcelona Licor 43  | 
← 1983–84  1985–86 →   | |
The 1984–85 ACB season was the 2nd season of the ACB Primera División, the top Spanish professional basketball league. It started on 23 September 1984 with the first round of the regular season and ended on 1 May 1985 with the finals. In this season, the league introduced the new FIBA rules with the three-point field goal as the main change.
Real Madrid won their second consecutive ACB title, and their 24th Spanish title.