1984–85 ACB season

ACB Primera División
Season1984–85
Games played258
Teams16
Regular season
RelegatedCaja Ronda
Lucky Canarias
Collado Villalba
Finals
ChampionsReal Madrid
2nd ACB title
24th Spanish title
Runners-upRon Negrita Joventut
SemifinalistsFC Barcelona
Licor 43

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.