| Tourney Name: | Copa Libertadores de América |
| Year: | 1975 |
| Dates: | February 16 – June 29 |
| Num Teams: | 21 |
| Associations: | 10 |
| Champion Other: |  Independiente |
| Count: | 6 |
| Second Other: |  Unión Española |
| Matches: | 76 |
| Goals: | 209 |
| Prevseason: | 1974 |
| Nextseason: | 1976 |
The Copa Libertadores 1975 was an association football competition contested between the top clubs of the CONMEBOL federation. Defending champions Independiente won the competition defeating Unión Española 2 - 0 in a play off after the original two legs finished 2 - 2 on points. This was Independiente's sixth Copa Libertadores title in a row.
| width=125 | Country | width=150 | Team | width=300 | Qualification method |
|---|---|---|---|---|---|
| CONMEBOL (1 berth) | Independiente | 1974 Copa Libertadores champion | |||
| Argentina (2 berths) | Rosario Central | 1974 Torneo Reducido winner | |||
| Newell's Old Boys | 1974 Torneo Reducido runner-up | ||||
(2 berths) | The Strongest | 1974 Primera División champion | |||
| Jorge Wilstermann | 1974 Primera División runner-up | ||||
(2 berths) | Vasco da Gama | 1974 Campeonato Brasileiro Série A champion | |||
| Cruzeiro | 1974 Campeonato Brasileiro Série A runner-up | ||||
(2 berths) | Huachipato | 1974 Primera División champion | |||
| Unión Española | 1974 Liguilla_Pre-Libertadores winner | ||||
(2 berths) | Deportivo Cali | 1974 Campeonato Profesional champion | |||
| Atlético Nacional | 1974 Campeonato Profesional runner-up | ||||
(2 berths) | LDU Quito | 1974 Campeonato Ecuatoriano champion | |||
| El Nacional | 1974 Campeonato Ecuatoriano runner-up | ||||
(2 berths) | Cerro Porteño | 1974 Primera División champion | |||
| Olimpia | 1974 Primera División runner-up | ||||
(2 berths) | Universitario | 1974 Primera División champion | |||
| Unión Huaral | 1974 Primera División runner-up | ||||
(2 berths) | Peñarol | 1974 Liguilla Pre-Libertadores winner | |||
| Montevideo Wanderers | 1974 Liguilla Pre-Libertadores runner-up | ||||
(2 berths) | Deportivo Galicia | 1974 Primera División champion | |||
| Portuguesa | 1974 Primera División runner-up | ||||
The champions and runners-up of each football association were drawn into the same group along with another football association's participating teams. Three clubs from Argentina competed as Independiente was champion of the 1974 Copa Libertadores. They entered the tournament in the Semifinals.
See main article: 1975 Copa Libertadores group stage.
See main article: 1975 Copa Libertadores Finals.