| GP of Italy Imola 14-9-1980, 60 laps of 5 km,Total distance 300 km | |||||
| Pos | No | Driver | Team-engine | Diff | Reason |
| 1 | - | Nelson Piquet | Brabham-Ford BT49 | 1:38:07.52 | - |
| 2 | - | Alan Jones | Williams-Ford FW07B | -28.93 | - |
| 3 | - | Carlos Reutemann | Williams-Ford FW07B | -1:13.67 | - |
| 4 | - | Elio de Angelis | Lotus-Ford 81 | -1 lap | - |
| 5 | - | Keke Rosberg | Fittipaldi-Ford F8 | -1 lap | - |
| 6 | - | Didier Pironi | Ligier-Ford JS11/15 | -1 lap | - |
| 7 | 8 | Alain Prost | McLaren-Ford M30 | -1 lap | - |
| 8 | - | Jody Scheckter | Ferrari 312T5 | -1 lap | - |
| 9 | - | Jacques Laffite | Ligier-Ford JS11/15 | -1 lap | - |
| 10 | - | René Arnoux | Renault RE20 | -2 laps | - |
| 11 | - | Rupert Keegan | Williams-Ford FW07B | -2 laps | - |
| 12 | - | Eddie Cheever | Osella-Ford FA1 | -3 laps | - |
| 13 | - | Jean-Pierre Jarier | Tyrrell-Ford 010 | -6 laps | Brakes |
| 14 | - | Jean-Pierre Jabouille | Renault RE20 | -7 laps | Gearbox |
| 15 | - | Marc Surer | ATS-Ford D4 | -15 laps | Engine |
| 16 | - | Mario Andretti | Lotus-Ford 81 | -20 laps | Engine |
| 17 | 29 | Riccardo Patrese | Arrows-Ford A3 | -22 laps | Engine |
| 18 | - | Derek Daly | Tyrrell-Ford 010 | -27 laps | Collision |
| 19 | - | John Watson | McLaren-Ford M29 | -40 laps | Wheel |
| 20 | - | Hector Rebaque | Brabham-Ford BT49 | -42 laps | Suspension |
| 21 | - | Emerson Fittipaldi | Fittipaldi-Ford F8 | -43 laps | Collision |
| 22 | - | Bruno Giacomelli | Alfa Romeo 179 | -54 laps | Tyre |
| 23 | - | Gilles Villeneuve | Ferrari 312T5 | -55 laps | Tyre |
| 24 | - | Vittorio Brambilla | Alfa Romeo 179 | -56 laps | Spun |
| 25 | 12 | Nigel Mansell | Lotus-Ford 81B | DNQ | - |
| 26 | - | Manfred Winkelhock | Arrows-Ford A3 | DNQ | - |
| 27 | - | Jan Lammers | Ensign-Ford N180 | DNQ | - |
| 28 | - | Geoff Lees | Ensign-Ford N180 | DNQ | - |