Race Result
| GP n. 505 - 02/06/1991 - Grand Prix of Canada Circuit Gilles Villeneuve |
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| Winner: | Nelson Piquet / Benetton-Ford - 1:38'51.490 | ||||||
| Pole Position: | Riccardo Patrese / Williams-Renault - 1:19.837 | ||||||
| Fastest Lap: | Nigel Mansell / Williams-Renault - 1:22.385 | ||||||
| Pos | Nš | Driver | Constructor | Laps | Time/Retired | Grid | Points |
| 1 | 20 |  Nelson Piquet |
Benetton-Ford | 69 | 1:38'51.490 | 8 | 10 |
| 2 | 4 |  Stefano Modena |
Tyrrell-Honda | 69 | +31.832 | 9 | 6 |
| 3 | 6 | Riccardo Patrese |
Williams-Renault | 69 | +42.217 | 1 | 4 |
| 4 | 33 | Andrea de Cesaris |
Jordan-Ford | 69 | +1'20.210 | 11 | 3 |
| 5 | 32 |  Bertrand Gachot |
Jordan-Ford | 69 | +1'22.351 | 14 | 2 |
| 6 | 5 |  Nigel Mansell |
Williams-Renault | 68 | electrical | 2 | 1 |
| 7 | 23 | Pierluigi Martini |
Minardi-Ferrari | 68 | + 1 lap | 18 | 0 |
| 8 | 26 |  Erik Comas |
Ligier-Lamborghini | 68 | + 1 lap | 26 | 0 |
| 9 | 21 | Emanuele Pirro |
Dallara-Judd | 68 | + 1 lap | 10 | 0 |
| 10 | 3 |  Satoru Nakajima |
Tyrrell-Honda | 67 | + 2 laps | 12 | 0 |
| Ret | 15 | Mauricio Gugelmin |
Leyton House-Ilmor | 61 | engine | 23 | 0 |
| Ret | 22 |  Jyrki Jarvi Lehto |
Dallara-Judd | 50 | engine | 17 | 0 |
| Ret | 10 |  Stefan Johansson |
Footwork-Porsche | 48 | throttle | 25 | 0 |
| Ret | 16 | Ivan Capelli |
Leyton House-Ilmor | 42 | engine | 13 | 0 |
| Ret | 28 | Jean Alesi |
Ferrari | 34 | engine | 7 | 0 |
| Ret | 29 | Eric Bernard |
Lola-Ford | 29 | gear box | 19 | 0 |
| Ret | 27 | Alain Prost |
Ferrari | 27 | gear box | 4 | 0 |
| Ret | 25 | Thierry Boutsen |
Ligier-Lamborghini | 27 | engine | 16 | 0 |
| Ret | 1 | Ayrton Senna |
McLaren-Honda | 25 | alternator | 3 | 0 |
| Ret | 7 | Martin Brundle |
Brabham-Yamaha | 21 | engine | 20 | 0 |
| Ret | 11 | Mika Hakkinen |
Lotus-Judd | 21 | spun off | 24 | 0 |
| Ret | 24 | Gianni Morbidelli |
Minardi-Ferrari | 20 | spun off | 15 | 0 |
| Ret | 19 | Roberto Moreno |
Benetton-Ford | 10 | suspension | 5 | 0 |
| Ret | 2 |  Gerhard Berger |
McLaren-Honda | 4 | injection | 6 | 0 |
| Ret | 30 | Aguri Suzuki |
Lola-Ford | 3 | fuel leak | 22 | 0 |
| Ret | 9 | Michele Alboreto |
Footwork-Porsche | 2 | throttle | 21 | 0 |
| Dnq | 17 | Gabriele Tarquini |
AGS-Ford | did not qualify | 0 | ||
| Dnq | 18 | Fabrizio Barbazza |
AGS-Ford | did not qualify | 0 | ||
| Dnq | 8 | Mark Blundell |
Brabham-Yamaha | did not qualify | 0 | ||
| Dnq | 13 |  Pedro Chaves |
Coloni-Ford | did not qualify | 0 | ||
| Dnq | 14 | Olivier Grouillard |
Fondmetal-Ford | did not qualify | 0 | ||
| Dnq | 34 | Nicola Larini |
Lambo-Lamborghini | did not qualify | 0 | ||
| Dnq | 35 | Eric van de Poele |
Lambo-Lamborghini | did not qualify | 0 | ||
| Dnq | 12 | Johnny Herbert |
Lotus-Judd | did not qualify | 0 | ||