May 12, 1991 Circuit de Monaco | Lap distance 3.328 km
Photos (2) | Championship standings | 1991 season
| Pos | Points | No | Driver | Car | Engine | Tyres | Laps | Race Time | Delay | Qualifying | Fastest Lap | |||
| 1 | 10 | 1 | Ayrton Senna (BRA) | McLaren MP4-6 | Honda RA121E | Goodyear | 78 | 1:53'02.334 | 1 | 1'20.344 | 5 | 1'25.250 | (32) | |
| 2 | 6 | 5 | Nigel Mansell (GBR) | Williams FW14 | Renault RS3 | Goodyear | 78 | 1:53'20.682 | +18.348 | 5 | 1'21.205 | 2 | 1'24.850 | (53) |
| 3 | 4 | 28 | Jean Alesi (FRA) | Ferrari F1-91 | Ferrari 037 | Goodyear | 78 | 1:53'49.789 | +47.455 | 9 | 1'21.910 | 8 | 1'26.055 | (51) |
| 4 | 3 | 19 | Roberto Moreno (BRA) | Benetton B191 | Ford HB | Pirelli | 77 | 1:53'03.636 | +1 lap | 8 | 1'21.804 | 7 | 1'25.823 | (31) |
| 5 | 2 | 27 | Alain Prost (FRA) | Ferrari F1-91 | Ferrari 037 | Goodyear | 77 | 1:53'09.799 | +1 lap | 7 | 1'21.455 | 1 | 1'24.368 | (77) |
| 6 | 1 | 21 | Emanuele Pirro (ITA) | Dallara BMS-191 | Judd GV | Pirelli | 77 | 1:54'41.162 | +1 lap | 12 | 1'23.022 | 11 | 1'26.924 | (52) |
| 7 | 25 | Thierry Boutsen (BEL) | Ligier JS35 | Lamborghini 3512 | Goodyear | 76 | 1:53'25.907 | +2 laps | 16 | 1'23.431 | 19 | 1'27.787 | (71) | |
| 8 | 32 | Bertrand Gachot (FRA) | Jordan 191 | Ford HB | Goodyear | 76 | 1:53'27.094 | +2 laps | 24 | 1'24.208 | 12 | 1'27.163 | (64) | |
| 9 | 29 | Eric Bernard (FRA) | Lola 91 | Ford Cosworth DFR | Goodyear | 76 | 1:53'27.341 | +2 laps | 21 | 1'24.079 | 15 | 1'27.624 | (64) | |
| 10 | 26 | Erik Comas (FRA) | Ligier JS35 | Lamborghini 3512 | Goodyear | 76 | 1:54'41.287 | +2 laps | 23 | 1'24.151 | 13 | 1'27.304 | (40) | |
| 11 | 22 | J J Lehto (FIN) | Dallara BMS-191 | Judd GV | Pirelli | 75 | 1:53'50.364 | +3 laps | 13 | 1'23.023 | 14 | 1'27.541 | (41) | |
| 12 | 23 | Pierluigi Martini (ITA) | Minardi M191 | Ferrari 037 | Goodyear | 72 | 1:54'55.119 | +6 laps | 14 | 1'23.064 | 17 | 1'27.740 | (49) | |
| Retirement | ||||||||||||||
| oil leak | 11 | Mika Häkkinen (FIN) | Team Lotus 102B | Judd EV | Goodyear | 64 | 1:35'45.356 | 26 | 1'24.829 | 10 | 1'26.627 | (64) | ||
| gearbox | 24 | Gianni Morbidelli (ITA) | Minardi M191 | Ferrari 037 | Goodyear | 49 | 1:13'41.194 | 17 | 1'23.584 | 21 | 1'28.648 | (41) | ||
| throttle | 15 | Mauricio Gugelmin (BRA) | Leyton House CG911 | Ilmor LH10 | Goodyear | 43 | 1:04'24.643 | 15 | 1'23.394 | 20 | 1'28.012 | (37) | ||
| engine | 4 | Stefano Modena (ITA) | Tyrrell 020 | Honda RA101E | Pirelli | 42 | 1:00'50.444 | 2 | 1'20.809 | 6 | 1'25.629 | (34) | ||
| spun off | 6 | Riccardo Patrese (ITA) | Williams FW14 | Renault RS3 | Goodyear | 42 | 1:00'51.745 | 3 | 1'20.973 | 3 | 1'25.147 | (34) | ||
| spun off | 8 | Mark Blundell (GBR) | Brabham BT60Y | Yamaha OX99 | Pirelli | 41 | 1:01'38.633 | 22 | 1'24.109 | 16 | 1'27.641 | (33) | ||
| engine | 9 | Michele Alboreto (ITA) | Footwork FA12 | Porsche F1 | Goodyear | 39 | 1:00'34.923 | 25 | 1'24.606 | 25 | 1'30.366 | (6) | ||
| spun off | 3 | Satoru Nakajima (JPN) | Tyrrell 020 | Honda RA101E | Pirelli | 35 | 51'54.417 | 11 | 1'22.972 | 17 | 1'27.740 | (11) | ||
| spun off | 30 | Aguri Suzuki (JPN) | Lola 91 | Ford Cosworth DFR | Goodyear | 24 | 36'14.988 | 19 | 1'23.898 | 22 | 1'28.661 | (6) | ||
| throttle | 33 | Andrea de Cesaris (ITA) | Jordan 191 | Ford HB | Goodyear | 21 | 30'48.050 | 10 | 1'22.764 | 9 | 1'26.257 | (10) | ||
| brakes | 16 | Ivan Capelli (ITA) | Leyton House CG911 | Ilmor LH10 | Goodyear | 12 | 24'34.909 | 18 | 1'23.642 | 23 | 1'28.803 | (4) | ||
| gearbox | 17 | Gabriele Tarquini (ITA) | AGS JH25B | Ford Cosworth DFR | Goodyear | 9 | 13'53.540 | 20 | 1'23.909 | 24 | 1'29.711 | (7) | ||
| spun off | 2 | Gerhard Berger (AUT) | McLaren MP4-6 | Honda RA121E | Goodyear | 9 | 16'46.804 | 6 | 1'21.222 | 4 | 1'25.228 | (6) | ||
| suspension | 20 | Nelson Piquet (BRA) | Benetton B191 | Ford HB | Pirelli | 0 | 4 | 1'21.159 | ||||||
| Not qualified | ||||||||||||||
| -- | 12 | Julian Bailey (GBR) | Team Lotus 102B | Judd EV | Goodyear | 1'26.995 | ||||||||
| -- | 18 | Fabrizio Barbazza (ITA) | AGS JH25B | Ford Cosworth DFR | Goodyear | 1'27.079 | ||||||||
| -- | 7 | Martin Brundle (GBR) | Brabham BT60Y | Yamaha OX99 | Pirelli | |||||||||
| -- | 10 | Alex Caffi (ITA) | Footwork FA12 | Porsche F1 | Goodyear | |||||||||
| Not pre-qualified | ||||||||||||||
| -- | 34 | Nicola Larini (ITA) | Lambo 291 | Lamborghini 3512 | Goodyear | 1'25.893 | ||||||||
| -- | 35 | Eric van de Poele (BEL) | Lambo 291 | Lamborghini 3512 | Goodyear | 1'26.282 | ||||||||
| -- | 31 | Pedro Chaves (POR) | Coloni C4 | Ford Cosworth DFR | Goodyear | 1'27.389 | ||||||||
| -- | 14 | Olivier Grouillard (FRA) | Fondmetal Fomet-1 | Ford Cosworth DFR | Goodyear | 1'27.759 | ||||||||
