The 1984 Canadian Grand Prix was a Formula One motor race held at Circuit Gilles Villeneuve, Montreal on 17 June 1984. It was the seventh race of the 1984 Formula One World Championship.

The race was won by Brazilian Nelson Piquet, driving a Brabham-BMW. Piquet took pole position, led all 70 laps and set the fastest race lap, finishing 2.6 seconds ahead of Austrian Niki Lauda in the McLaren-TAG. Lauda's French teammate, Alain Prost, finished third.

Prost actually won the start from Piquet, but exiting the Epingle de l'ile hairpin halfway around the first lap his TAG turbo went flat under acceleration and the Brabham was past in a flash never to be headed again. The TAG turbo would have intermittent electrical issues for Prost which helped Lauda take 2nd from his team mate before the end.