The Copa Libertadores 1989 was the 30th edition of the Copa Libertadores, South America's premier international club football tournament organized by CONMEBOL.

21 teams participated in the competition, divided by groups of four (two per country).

Nacional of Montevideo entered directly into the second round as the champions of Copa Libertadores 1988.

Three clubs from Uruguay competed as Nacional was champion of the 1988 Copa Libertadores.

The top three teams of each group, as well as Nacional of Uruguay (who received a bye as winners of the Copa Libertadores 1988 of the tournament) qualified for the Round of 16.