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 fourth Copa Libertadores title in a row.

Country	Team	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
Bolivia (2 berths)	The Strongest	1974 Primera División champion
	Jorge Wilstermann	1974 Primera División runner-up
Brazil (2 berths)	Vasco da Gama	1974 Campeonato Brasileiro Série A champion
	Cruzeiro	1974 Campeonato Brasileiro Série A runner-up
Chile (2 berths)	Huachipato	1974 Primera División champion
	Unión Española	1974 Liguilla_Pre-Libertadores winner
Colombia (2 berths)	Deportivo Cali	1974 Campeonato Profesional champion
	Atlético Nacional	1974 Campeonato Profesional runner-up
Ecuador (2 berths)	LDU Quito	1974 Campeonato Ecuatoriano champion
	El Nacional	1974 Campeonato Ecuatoriano runner-up
Paraguay (2 berths)	Cerro Porteño	1974 Primera División champion
	Olimpia	1974 Primera División runner-up
Peru (2 berths)	Universitario	1974 Primera División champion
	Unión Huaral	1974 Primera División runner-up
Uruguay (2 berths)	Peñarol	1974 Liguilla Pre-Libertadores winner
	Montevideo Wanderers	1974 Liguilla Pre-Libertadores runner-up
Venezuela (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.

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification or relegation		ROS	NOB	OLI	CER
1	Rosario Central	6	2	4	0	8	5	+3	8	Qualified to the Semi-finals		—	1–1	1–1	2–1
2	Newell's Old Boys	6	3	2	1	9	8	+1	8			1–1	—	3–2	3–2
3	Olimpia	6	2	3	1	7	5	+2	7			0–0	2–0	—	2–1
4	Cerro Porteño	6	0	1	5	5	11	−6	1			1–3	0–1	0–0	—

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts			UES	HUA	STR	WIL
1	Unión Española	6	3	3	0	17	5	+12	9	Qualified to the Semi-finals		—	7–2	4–1	4–0
2	Huachipato	6	2	2	2	10	10	0	6			0–0	—	4–0	4–2
3	The Strongest	6	2	2	2	8	11	−3	6			1–1	1–0	—	3–1
4	Jorge Wilstermann	6	0	3	3	4	13	−9	3			1–1	0–0	1–1	—

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification or relegation		CRU	CAL	ATL	VAS
1	Cruzeiro	6	3	1	2	10	9	+1	7	Qualified to the Semi-finals		—	2–1	2–3	3–2
2	Deportivo Cali	6	2	2	2	5	5	0	6			1–0	—	0–0	2–1
3	Atlético Nacional	6	2	2	2	7	8	−1	6			1–2	2–1	—	1–1
4	Vasco da Gama	6	1	3	2	7	7	0	5			1–1	0–0	2–0	—

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification or relegation		LDQ	POR	DGA	NAC
1	LDU Quito	6	3	3	0	12	7	+5	9	Qualified to the Semi-finals		—	1–1	4–2	3–1
2	Portuguesa	6	1	4	1	5	8	−3	6			1–1	—	1–1	1–0
3	Deportivo Galicia	6	1	3	2	7	6	+1	5			0–1	0–0	—	4–0
4	El Nacional	6	1	2	3	8	11	−3	4			2–2	5–1	0–0	—

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification or relegation		UNI	PEÑ	WAN	HUA
1	Universitario	6	4	2	0	12	6	+6	10	Qualified to the Semi-finals		—	3–2	3–1	2–2
2	Peñarol	6	4	0	2	13	7	+6	8			0–1	—	1–0	5–2
3	Montevideo Wanderers	6	1	1	4	8	10	−2	3			0–2	1–2	—	4–0
4	Unión Huaral	6	0	3	3	7	17	−10	3			1–1	0–3	2–2	—

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification or relegation		UE	UNI	LDQ
1	Unión Española	4	2	1	1	7	6	+1	5	Qualified to the Final		—	2–1	2–0
2	Universitario	4	1	2	1	4	4	0	4			1–1	—	2–1
3	LDU Quito	4	1	1	2	5	6	−1	3			4–2	0–0	—

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification or relegation		IND	CEN	CRU
1	Independiente	4	2	0	2	5	4	+1	4	Qualified to the Final		—	2–0	3–0
2	Rosario Central	4	2	0	2	5	5	0	4			2–0	—	3–1
3	Cruzeiro	4	2	0	2	5	6	−1	4			2–0	2–0	—

Unión Española v Independiente

June 18, 1975	Unión Española	1–0	Independiente	Estadio Nacional, Santiago
	Ahumada 87'			Attendance: 65,000 Referee: Martínez Bazán

Independiente v Unión Española

June 25, 1975	Independiente	3−1	Unión Española	Estadio La Doble Visera, Avellaneda
	Rojas 1' Pavoni 57' Bertoni 82'		Las Heras 15'	Attendance: 60,000 Referee: Barreto

Independiente v Unión Española

June 29, 1975	Independiente	2−0	Unión Española	Estadio Defensores del Chaco, Asunción
	Ruiz Moreno 13' Bertoni 87'			Attendance: 55,000 Referee: Pérez

Copa Libertadores 1975 Champions
Independiente Sixth title

• Tournament on RSSSF