Classification
| Pos | No | Driver | Constructor | Laps | Time/Retired | Grid | Points |
|---|---|---|---|---|---|---|---|
| 1 | 2 | Carlos Reutemann | Williams-Ford | 54 | 1:16:31.61 | 1 | 9 |
| 2 | 26 | Jacques Laffite | Ligier-Matra | 54 | + 36.06 s | 9 | 6 |
| 3 | 12 | Nigel Mansell | Lotus-Ford | 54 | + 43.69 s | 10 | 4 |
| 4 | 27 | Gilles Villeneuve | Ferrari | 54 | + 47.64 s | 7 | 3 |
| 5 | 11 | Elio de Angelis | Lotus-Ford | 54 | + 49.20 s | 14 | 2 |
| 6 | 3 | Eddie Cheever | Tyrrell-Ford | 54 | + 52.51 s | 8 | 1 |
| 7 | 7 | John Watson | McLaren-Ford | 54 | + 1:01.66 | 5 | |
| 8 | 28 | Didier Pironi | Ferrari | 54 | + 1:32.04 | 3 | |
| 9 | 23 | Bruno Giacomelli | Alfa Romeo | 54 | + 1:35.58 | 17 | |
| 10 | 22 | Mario Andretti | Alfa Romeo | 53 | + 1 lap | 18 | |
| 11 | 14 | Marc Surer | Ensign-Ford | 52 | + 2 laps | 15 | |
| 12 | 4 | Michele Alboreto | Tyrrell-Ford | 52 | + 2 laps | 19 | |
| 13 | 31 | Piercarlo Ghinzani | Osella-Ford | 50 | + 4 laps | 24 | |
| Ret | 6 | Hector Rebaque | Brabham-Ford | 39 | Accident | 21 | |
| Ret | 25 | Jean-Pierre Jabouille | Ligier-Matra | 35 | Transmission | 16 | |
| Ret | 21 | Chico Serra | Fittipaldi-Ford | 29 | Engine | 20 | |
| Ret | 32 | Beppe Gabbiani | Osella-Ford | 22 | Engine | 22 | |
| Ret | 1 | Alan Jones | Williams-Ford | 19 | Accident | 6 | |
| Ret | 8 | Andrea de Cesaris | McLaren-Ford | 11 | Gearbox | 23 | |
| Ret | 5 | Nelson Piquet | Brabham-Ford | 10 | Accident | 2 | |
| Ret | 20 | Keke Rosberg | Fittipaldi-Ford | 10 | Gearbox | 11 | |
| Ret | 15 | Alain Prost | Renault | 2 | Clutch | 12 | |
| Ret | 29 | Riccardo Patrese | Arrows-Ford | 0 | Collision | 4 | |
| Ret | 30 | Siegfried Stohr | Arrows-Ford | 0 | Collision | 13 | |
| DNQ | 18 | Derek Daly | March-Ford | ||||
| DNQ | 16 | René Arnoux | Renault | ||||
| DNQ | 17 | Eliseo Salazar | March-Ford | ||||
| DNQ | 9 | Slim Borgudd | ATS-Ford | ||||
| DNQ | 33 | Patrick Tambay | Theodore-Ford | ||||
| DNQ | 36 | Derek Warwick | Toleman-Hart | ||||
| DNQ | 35 | Brian Henton | Toleman-Hart |
Read more about this topic: 1981 Belgian Grand Prix