The 1984 Budweiser GT 1000 Kilometers was the sixth round of the 1984 World Endurance Championship. It took place at Mosport Park, Canada on 5 August 1984.

Several World Championship competitors opted not to participate in the Mosport round, including all B class entries. Three GTO class cars from the IMSA GT Championship chose to enter the round.

Class winners in bold. Cars failing to complete 75% of the winner's distance marked as Not Classified (NC).

Pos	Class	No	Team	Drivers	Chassis	Tyre	Laps
					Engine
1	C1	1	Rothmans Porsche	Jochen Mass Jacky Ickx	Porsche 956	D	253
					Porsche Type-935 2.6 L Turbo Flat-6
2	C1	33	Skoal Bandit Porsche Team John Fitzpatrick Racing	David Hobbs Rupert Keegan Franz Konrad	Porsche 956B	G	245
					Porsche Type-935 2.6 L Turbo Flat-6
3	C2	81	Jolly Club	Almo Coppelli Guido Daccò	Alba AR2	A	229
					Giannini Carma FF 1.9 L Turbo I4
4	C1	2	Rothmans Porsche	Stefan Bellof Derek Bell	Porsche 956	D	221
					Porsche Type-935 2.6 L Turbo Flat-6
5	C2	82	Maurizio Gellini	Maurizio Gellini Gerardo Vatielli Pasquale Barberio	Alba AR3	?	217
					Ford Cosworth DFL 3.3 L V8
6	C2	80	Jolly Club	Martino Finotto Alfredi Sebastiani Carlo Facetti	Alba AR2	A	204
					Giannini Carma FF 1.9 L Turbo I4
7	C2	99	J.Q.F. Engineering Ltd.	Jeremy Rossiter Roy Baker Peter Lockhart	Tiga GC284	A	185
					Ford Cosworth BDT 1.8 L Turbo I4
8 NC	C1	20	Porsche Kremer Racing	Bill Adam Kees Nierop George Fouché	Porsche 956	G	159
					Porsche Type-935 2.6 L Turbo Flat-6
9 NC	C1	3	Rothmans Porsche	Vern Schuppan Nick Mason	Porsche 956	D	156
					Porsche Type-935 2.6 L Turbo Flat-6
10 DNF	C2	84	Lyncar Motorsport Ltd.	Costas Los Allen Berg	Lyncar MS83	A	206
					Ford Cosworth DFV 3.0 L V8
11 DNF	C1	19	Brun Motorsport	Walter Brun Oscar Larrauri	Porsche 956	D	204
					Porsche Type-935 2.6 L Turbo Flat-6
12 DNF	IMSA GTO	40	Bieri Racing	Uli Bieri Matt Gysler	BMW M1	G	190
					BMW M88/1 3.5 L I6
13 DNF	IMSA GTO	65	English Enterprizes	Gary English Mike Laws	Chevrolet Camaro	?	156
					Chevrolet V8
14 DNF	C1	21	Charles Ivey Racing	Barry Robinson Dudley Wood	Grid S2	A	127
					Porsche Type-935 2.9 L Turbo Flat-6
15 DNF	C2	73	Gebhardt Motorsport	John Graham George Schwarz	Gebhardt JC843	A	40
					Ford Cosworth DFV 3.0 L V8
16 DNF	IMSA GTO	60	Alps Restoration	Peter Aschenbrenner Mike Freberg	Audi 80	?	12
					Audi 2.2 L I5
DNS	C1	55	Skoal Bandit Porsche Team John Fitzpatrick Racing	Rupert Keegan Franz Konrad	Porsche 956	G	-
					Porsche Type-935 2.6 L Turbo Flat-6

• Pole Position - #2 Rothmans Porsche - 1:12.107
• Fastest Lap - #2 Rothmans Porsche - 1:13.874
• Average Speed - 166.550 km/h (103.489 mph)