Race Result
| GP n. 506 - 16/06/1991 - Grand Prix of Mexico Autodromo Hermanos Rodriguez |
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| Winner: | Riccardo Patrese / Williams-Renault - 1:29'52.205 | ||||||
| Pole Position: | Riccardo Patrese / Williams-Renault - 1:16.696 | ||||||
| Fastest Lap: | Nigel Mansell / Williams-Renault - 1:16.788 | ||||||
| Pos | Nš | Driver | Constructor | Laps | Time/Retired | Grid | Points |
| 1 | 6 |  Riccardo Patrese |
Williams-Renault | 67 | 1:29'52.205 | 1 | 10 |
| 2 | 5 |  Nigel Mansell |
Williams-Renault | 67 | +1.336 | 2 | 6 |
| 3 | 1 |  Ayrton Senna |
McLaren-Honda | 67 | +57.356 | 3 | 4 |
| 4 | 33 | Andrea de Cesaris |
Jordan-Ford | 66 | +1 lap | 11 | 3 |
| 5 | 19 | Roberto Moreno |
Benetton-Ford | 66 | + 1 lap | 9 | 2 |
| 6 | 29 |  Eric Bernard |
Lola-Ford | 66 | + 1 lap | 18 | 1 |
| 7 | 24 | Gianni Morbidelli |
Minardi-Ferrari | 66 | + 1 lap | 23 | 0 |
| 8 | 25 |  Thierry Boutsen |
Ligier-Lamborghini | 65 | + 2 laps | 14 | 0 |
| 9 | 11 |  Mika Hakkinen |
Lotus-Judd | 65 | + 2 laps | 24 | 0 |
| 10 | 12 | Johnny Herbert |
Lotus-Judd | 65 | + 2 laps | 25 | 0 |
| 11 | 4 | Stefano Modena |
Tyrrell-Honda | 65 | + 2 laps | 8 | 0 |
| 12 | 3 |  Satoru Nakajima |
Tyrrell-Honda | 64 | + 3 laps | 13 | 0 |
| Ret | 8 | Mark Blundell |
Brabham-Yamaha | 54 | engine | 12 | 0 |
| Ret | 32 | Bertrand Gachot |
Jordan-Ford | 51 | spun off` | 20 | 0 |
| Ret | 30 | Aguri Suzuki |
Lola-Ford | 48 | gear box | 19 | 0 |
| Ret | 20 | Nelson Piquet |
Benetton-Ford | 44 | wheel bearing | 6 | 0 |
| Ret | 28 | Jean Alesi |
Ferrari | 42 | clutch | 4 | 0 |
| Ret | 22 | Jyrki Jarvi Lehto |
Dallara-Judd | 30 | engine | 16 | 0 |
| Ret | 9 | Michele Alboreto |
Footwork-Porsche | 24 | engine | 26 | 0 |
| Ret | 7 | Martin Brundle |
Brabham-Yamaha | 20 | wheel | 17 | 0 |
| Ret | 16 | Ivan Capelli |
Leyton House-Ilmor | 19 | engine | 22 | 0 |
| Ret | 27 | Alain Prost |
Ferrari | 16 | alternator | 7 | 0 |
| Ret | 15 | Mauricio Gugelmin |
Leyton House-Ilmor | 15 | engine | 21 | 0 |
| Ret | 14 | Olivier Grouillard |
Fondmetal-Ford | 13 | engine | 10 | 0 |
| Ret | 2 |  Gerhard Berger |
McLaren-Honda | 5 | engine | 5 | 0 |
| Ret | 23 | Pierluigi Martini |
Minardi-Ferrari | 4 | spun off | 15 | 0 |
| Dnq | 17 | Gabriele Tarquini |
AGS-Ford | did not qualify | 0 | ||
| Dnq | 18 | Fabrizio Barbazza |
AGS-Ford | did not qualify | 0 | ||
| Dnq | 13 |  Pedro Chaves |
Coloni-Ford | did not qualify | 0 | ||
| Dnq | 21 | Emanuele Pirro |
Dallara-Judd | did not qualify | 0 | ||
| Dnq | 10 |  Stefan Johansson |
Footwork-Porsche | 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 | 26 | Erik Comas |
Ligier-Lamborghini | did not qualify | 0 | ||