13 septembre 1981 Circuit de Monza | Longueur : 5.800 km
| Pts | n° | Pilote | Châssis | Moteur | Pneus | Tours | Temps | Écart | Qualifications | Meilleur tour | ||||
| 1 | 9 | 15 | Alain Prost (FRA) | Renault RE30 | Renault EF1 | Michelin | 52 | 1:26'33.897 | 3 | 1'34.374 | 4 | 1'37.702 | (9) | |
| 2 | 6 | 1 | Alan Jones (AUS) | Williams FW07D | Ford Cosworth DFV | Goodyear | 52 | 1:26'56.072 | +22.175 | 5 | 1'35.359 | 2 | 1'37.536 | (47) |
| 3 | 4 | 2 | Carlos Reutemann (ARG) | Williams FW07C | Ford Cosworth DFV | Goodyear | 52 | 1:27'24.484 | +50.587 | 2 | 1'34.140 | 1 | 1'37.528 | (48) |
| 4 | 3 | 11 | Elio de Angelis (ITA) | Team Lotus 87 | Ford Cosworth DFV | Goodyear | 52 | 1:28'06.799 | +1'32.902 | 11 | 1'36.158 | 7 | 1'38.498 | (31) |
| 5 | 2 | 28 | Didier Pironi (FRA) | Ferrari 126CK | Ferrari 126C | Michelin | 52 | 1:28'08.419 | +1'34.522 | 8 | 1'35.596 | 14 | 1'39.652 | (9) |
| 6 | 1 | 5 | Nelson Piquet (BRA) | Brabham BT49C | Ford Cosworth DFV | Goodyear | 51 | 1:25'35.857 | +1 tour | 6 | 1'35.449 | 3 | 1'37.590 | (45) |
| 7 | 8 | Andrea de Cesaris (ITA) | McLaren MP4-1 | Ford Cosworth DFV | Michelin | 51 | 1:26'25.320 | +1 tour | 16 | 1'37.019 | 12 | 1'39.401 | (32) | |
| 8 | 23 | Bruno Giacomelli (ITA) | Alfa Romeo 179C | Alfa Romeo 1260 | Michelin | 50 | 1:26'35.778 | +2 tours | 10 | 1'35.946 | 6 | 1'37.893 | (48) | |
| 9 | 32 | Jean-Pierre Jarier (FRA) | Osella FA1C | Ford Cosworth DFV | Michelin | 50 | 1:27'32.931 | +2 tours | 18 | 1'37.264 | 22 | 1'41.835 | (3) | |
| 10 | 35 | Brian Henton (GBR) | Toleman TG181 | Hart 415T | Pirelli | 49 | 1:28'12.032 | +3 tours | 23 | 1'38.012 | 23 | 1'43.825 | (3) | |
| Abandon(s) | ||||||||||||||
| moteur | 22 | Mario Andretti (USA) | Alfa Romeo 179D | Alfa Romeo 1260 | Michelin | 40 | 1:07'46.666 | 13 | 1'36.296 | 13 | 1'39.585 | (30) | ||
| boîte de vitesses | 17 | Derek Daly (IRL) | March 811 | Ford Cosworth DFV | Avon | 36 | 1:02'54.402 | 19 | 1'37.309 | 10 | 1'39.139 | (8) | ||
| ponction | 25 | Patrick Tambay (FRA) | Ligier JS17 | Matra MS81 | Michelin | 22 | 37'15.263 | 15 | 1'36.515 | 9 | 1'38.575 | (9) | ||
| suspension | 12 | Nigel Mansell (GBR) | Team Lotus 87 | Ford Cosworth DFV | Goodyear | 20 | 36'11.363 | 12 | 1'36.210 | 19 | 1'40.257 | (4) | ||
| accident | 7 | John Watson (GBR) | McLaren MP4-1 | Ford Cosworth DFV | Michelin | 19 | 32'16.493 | 7 | 1'35.557 | 11 | 1'39.386 | (8) | ||
| boîte de vitesses | 29 | Riccardo Patrese (ITA) | Arrows A3 | Ford Cosworth DFV | Pirelli | 18 | 31'34.510 | 20 | 1'37.355 | 16 | 1'40.045 | (7) | ||
| accident | 4 | Michele Alboreto (ITA) | Tyrrell 011 | Ford Cosworth DFV | Goodyear | 17 | 32'16.952 | 22 | 1'37.912 | 20 | 1'40.620 | (7) | ||
| sortie de piste | 14 | Eliseo Salazar (CHI) | Ensign N180B | Ford Cosworth DFV | Avon | 13 | 22'40.021 | 24 | 1'38.053 | 17 | 1'40.131 | (7) | ||
| sortie de piste | 16 | René Arnoux (FRA) | Renault RE30 | Renault EF1 | Michelin | 12 | 28'02.002 | 1 | 1'33.467 | 5 | 1'37.886 | (8) | ||
| ponction | 26 | Jacques Laffite (FRA) | Ligier JS17 | Matra MS81 | Michelin | 11 | 18'42.586 | 4 | 1'35.062 | 8 | 1'38.532 | (5) | ||
| sortie de piste | 3 | Eddie Cheever (USA) | Tyrrell 011 | Ford Cosworth DFV | Goodyear | 11 | 19'03.016 | 17 | 1'37.160 | 18 | 1'40.165 | (7) | ||
| sortie de piste | 9 | Slim Borgudd (SWE) | ATS HGS1 | Ford Cosworth DFV | Avon | 10 | 17'21.989 | 21 | 1'37.807 | 21 | 1'41.117 | (4) | ||
| moteur | 27 | Gilles Villeneuve (CAN) | Ferrari 126CK | Ferrari 126C | Michelin | 5 | 8'35.255 | 9 | 1'35.627 | 15 | 1'39.814 | (3) | ||
| électrique | 6 | Hector Rebaque (MEX) | Brabham BT49C | Ford Cosworth DFV | Goodyear | 1 | 4'28.329 | 14 | 1'36.472 | 24 | 4'28.329 | (1) | ||
| Non qualifié | ||||||||||||||
| -- | 33 | Marc Surer (SUI) | Theodore TY01 | Ford Cosworth DFV | Avon | 1'38.114 | ||||||||
| -- | 31 | Beppe Gabbiani (ITA) | Osella FA1B | Ford Cosworth DFV | Michelin | 1'38.474 | ||||||||
| -- | 36 | Derek Warwick (GBR) | Toleman TG181 | Hart 415T | Pirelli | 1'39.279 | ||||||||
| -- | 30 | Siegfried Stohr (ITA) | Arrows A3 | Ford Cosworth DFV | Pirelli | 1'39.713 | ||||||||
| -- | 20 | Keke Rosberg (FIN) | Fittipaldi F8C | Ford Cosworth DFV | Pirelli | 1'40.345 | ||||||||
| -- | 21 | Chico Serra (BRA) | Fittipaldi F8C | Ford Cosworth DFV | Pirelli | 1'40.437 | ||||||||