Velika nagrada San Marina 1981 je bila četrta dirka Svetovnega prvenstva Formule 1 v sezoni 1981. Odvijala se je 3. maja 1981.

Dirka thumb|332px|Sedmouvrščeni Gilles Villeneuve, Ferrari

! 1 | 5 | Nelson Piquet | Brabham-Ford | 60 | 1:51:23,97 | 5 | 9 |- ! 2 | 29 | Riccardo Patrese | Arrows-Ford | 60 | + 4,58 s | 9 | 6 |- ! 3 | 2 | Carlos Reutemann | Williams-Ford | 60 | + 6,34 s | 2 | 4 |- ! 4 | 6 | Hector Rebaque | Brabham-Ford | 60 | + 22,89 s | 13 | 3 |- ! 5 | 28 | Didier Pironi | Ferrari | 60 | + 25,87 s | 6 | 2 |- ! 6 | 8 | Andrea de Cesaris | McLaren-Ford | 60 | + 1:06,61 | 14 | 1 |- ! 7 | 27 | Gilles Villeneuve | Ferrari | 60 | + 1:41,97 | 1

! 8 | 16 | René Arnoux | Renault | 59 | +1 krog | 3

! 9 | 14 | Marc Surer | Ensign-Ford | 59 | +1 krog | 21

! 10 | 7 | John Watson | McLaren-Ford | 58 | +2 kroga | 7

! 11 | 33 | Patrick Tambay | Theodore-Ford | 58 | +2 kroga | 16

! 12 | 1 | Alan Jones | Williams-Ford | 58 | +2 kroga | 8

! 13 | 10 | Slim Borgudd | ATS-Ford | 57 | +3 krogi | 24

! NC | 25 | Jean-Pierre Jabouille | Ligier-Matra | 45 | +15 krogov | 18

! Ods | 17 | Eliseo Salazar | March-Ford | 38 | Zavrten | 23

! Ods | 4 | Michele Alboreto | Tyrrell-Ford | 31 | Trčenje | 17

! Ods | 32 | Beppe Gabbiani | Osella-Ford | 31 | Trčenje | 20

! Ods | 23 | Bruno Giacomelli | Alfa Romeo | 28 | Trčenje | 11

! Ods | 3 | Eddie Cheever | Tyrrell-Ford | 28 | Trčenje | 19

! Ods | 22 | Mario Andretti | Alfa Romeo | 26 | Menjalnik | 12

! Ods | 20 | Keke Rosberg | Fittipaldi-Ford | 14 | Motor | 15

! Ods | 26 | Jacques Laffite | Ligier-Matra | 7 | Vzmetenje | 10

! Ods | 15 | Alain Prost | Renault | 3 | Menjalnik | 4

! Ods | 31 | Miguel Angel Guerra | Osella-Ford | 0 | Trčenje | 22

! DNQ | 30 | Siegfried Stohr | Arrows-Ford

! DNQ | 18 | Derek Daly | March-Ford

! DNQ | 9 | Jan Lammers | ATS-Ford

! DNQ | 21 | Chico Serra | Fittipaldi-Ford

! DNQ | 36 | Derek Warwick | Toleman-Hart

! DNQ | 35 | Brian Henton | Toleman-Hart

! WD | 11 | Elio de Angelis | Lotus-Ford

! WD | 12 | Nigel Mansell | Lotus-Ford

Opombe Najhitrejši krog: Gilles Villeneuve 1'48.064

Kategorija:Formula 1 sezona 1981 1981