Mexikos Grand Prix 1991 var det sjätte av 16 lopp ingående i formel 1-VM 1991.
- Riccardo Patrese, Williams-Renault, 10 poäng
- Nigel Mansell, Williams-Renault, 6
- Ayrton Senna, McLaren-Honda, 4
- Andrea de Cesaris, Jordan-Ford, 3
- Roberto Moreno, Benetton-Ford, 2
- Eric Bernard, Larrousse (Lola-Ford), 1
- Gianni Morbidelli, Minardi-Ferrari
- Thierry Boutsen, Ligier-Lamborghini
- Mika Häkkinen, Lotus-Judd
- Johnny Herbert, Lotus-Judd
- Stefano Modena, Tyrrell-Honda
- Satoru Nakajima, Tyrrell-Honda
- Mark Blundell, Brabham-Yamaha (varv 54, motor)
- Bertrand Gachot, Jordan-Ford (51, snurrade av)
- Aguri Suzuki, Larrousse (Lola-Ford) (48, växellåda)
- Nelson Piquet, Benetton-Ford (44, hjullager)
- Jean Alesi, Ferrari (42, koppling)
- JJ Lehto, BMS Scuderia Italia (Dallara-Judd) (30, motor)
- Michele Alboreto, Footwork-Porsche (24, motor)
- Martin Brundle, Brabham-Yamaha (20, hjul)
- Ivan Capelli, Leyton House-Ilmor (19, motor)
- Alain Prost, Ferrari (16, generator)
- Mauricio Gugelmin, Leyton House-Ilmor (15, motor)
- Olivier Grouillard, Fondmetal-Ford (13, motor)
- Gerhard Berger, McLaren-Honda (5, motor)
- Pierluigi Martini, Minardi-Ferrari (4, snurrade av)