The 1989 Copa del Rey was the 53rd edition of the Spanish basketball Cup.
It was organized by the ACB and its Final Eight was played in A Coruña, in the Pazo dos Deportes de Riazor between 15 and 17 November 1988.
This edition was played by the 24 teams of the 1988–89 ACB season.
Teams #2 played the second leg at home.
Real Madrid won its 21st title thanks to 27 points of Petrović, who won at A Coruña his only title in Spain.