The Copa Libertadores 1983 was the 24th edition of the Copa Libertadores, CONMEBOL's annual international club tournament. Grêmio won the competition against Peñarol.

Country	Team	Qualify method
CONMEBOL (1 berth)	Peñarol	1982 Copa Libertadores champion
Argentina 2 berths	Ferro Carril Oeste	1982 Campeonato Nacional champions
	Estudiantes	1982 Campeonato Metropolitano champions
Bolivia 2 berths	Bolivar	1982 Primera División champion
	Blooming	1982 Primera División runner-up
Brazil 2 berths	Flamengo	1982 Campeonato Brasileiro Série A champion
	Grêmio	1982 Campeonato Brasileiro Série A 2nd place
Chile 2 berths	Cobreloa	1982 Primera División champion
	Colo-Colo	1982 Liguilla Pre-Copa Libertadores winner
Colombia 2 berths	América de Cali	1982 Campeonato Profesional champion
	Deportes Tolima	1982 Campeonato Profesional runner-up
Ecuador 2 berths	El Nacional	1982 Campeonato Ecuatoriano de Fútbol Serie A champion
	Barcelona	1982 Campeonato Ecuatoriano de Fútbol Serie A runner-up
Paraguay 2 berths	Olimpia	1982 Primera División champion
	Nacional	1982 Primera División runner-up
Peru 2 berths	Universitario	1982 Torneo Descentralizado champion
	Alianza Lima	1982 Torneo Descentralizado runner-up
Uruguay 2 berths	Nacional	1982 Liguilla Pre-Libertadores winner
	Montevideo Wanderers	1982 Liguilla Pre-Libertadores runner-up
Venezuela 2 berths	San Cristóbal	1982 Primera División champion
	Deportivo Táchira	1982 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 Uruguay competed as Peñarol was champion of the 1982 Copa Libertadores. They entered the tournament in the Semifinals.

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification		EST	COB	COL	FER
1	Estudiantes	6	3	1	2	8	6	+2	7	Semi-finals		—	2–0	4–1	0–0
2	Cobreloa	6	3	0	3	8	6	+2	6			3–0	—	2–0	2–1
3	Colo-Colo	6	3	0	3	5	8	−3	6			1–0	2–1	—	1–0
4	Ferro Carril Oeste	6	2	1	3	4	5	−1	5			1–2	1–0	1–0	—

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification		GRE	FLA	BOL	BLO
1	Grêmio	6	5	1	0	13	4	+9	11	Semi-finals		—	1–1	3–1	2–0
2	Flamengo	6	2	2	2	15	10	+5	6			1–3	—	5–2	7–1
3	Bolívar	6	2	0	4	13	14	−1	4			1–2	3–1	—	6–0
4	Blooming	6	1	1	4	4	17	−13	3			0–2	0–0	3–0	—

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification		AME	TOL	UNI	ALI
1	América de Cali	6	4	2	0	10	3	+7	10	Semi-finals		—	1–1	2–0	2–0
2	Deportes Tolima	6	1	4	1	5	6	−1	6			0–2	—	1–1	0–0
3	Universitario	6	0	4	2	5	8	−3	4			1–1	2–2	—	0–0
4	Alianza Lima	6	1	2	3	3	6	−3	4			1–2	0–1	2–1	—

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification		CRI	NAC	BAR	TAC
1	San Cristóbal	6	3	2	1	8	4	+4	8	Semi-finals		—	1–0	2–0	2–0
2	El Nacional	6	3	1	2	7	4	+3	7			1–0	—	3–1	3–0
3	Barcelona	5	1	2	2	7	9	−2	4			3–3	2–0	—	—
4	Deportivo Táchira	5	0	3	2	1	6	−5	3			0–0	0–0	1–1	—

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification		NAC	WAN	NAP	OLI
1	Nacional	6	4	1	1	12	6	+6	9	Semi-finals		—	1–1	4–2	3–0
2	Montevideo Wanderers	6	3	3	0	9	5	+4	9			1–0	—	3–1	0–0
3	Nacional	6	1	2	3	6	12	−6	4			0–3	1–1	—	0–0
4	Olimpia	6	0	2	4	3	9	−6	2			0–1	2–3	1–2	—

Team 1	Score	Team 2
Nacional	2–1	Montevideo Wanderers

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification		GRE	EST	AME
1	Grêmio	4	2	1	1	7	6	+1	5	Finals		—	2–1	2–1
2	Estudiantes	4	1	2	1	6	5	+1	4			3–3	—	2–0
3	América de Cali	4	1	1	2	2	4	−2	3			1–0	0–0	—

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification		PEÑ	NAC	CRI
1	Peñarol	4	3	1	0	5	1	+4	7	Finals		—	2–0	1–0
2	Nacional	4	2	0	2	8	6	+2	4			1–2	—	5–1
3	San Cristóbal	4	0	1	3	2	8	−6	1			0–0	1–2	—

Peñarol v Grêmio

22 July 1983

Peñarol

1–1

Grêmio

Estadio Centenario, Montevideo

Grêmio v Peñarol

28 July 1983

Grêmio

2–1

Peñarol

Estádio Olímpico, Porto Alegre

Copa Libertadores 1983 Winner
Gremio First Title

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