The Copa Libertadores 1990 was the 31st edition of the Copa Libertadores, South America's premier international club football tournament organized by CONMEBOL.

Olimpia won the 1990 edition after defeating Barcelona with a 3-1 aggregate in the finals.

One of the players for Olimpia was legendary goalkeeper Ever Hugo Almeida, who retired from professional football the following year.

The champions and runners-up of each football association were drawn into the same group along with another football association's participating teams.

Only one club from Colombia competed as Atlético Nacional was champion of the 1989 Copa Libertadores.