1931 Monaco Grand Prix Entries Entries

| Driver | Entrant | Constructor_ | Chassis | Engine |
|---|---|---|---|---|
| Tazio Nuvolari | SA Alfa Romeo | Alfa Romeo | Alfa Romeo 8C-2300 | 2.3 L8 |
| Goffredo Zehender | Scuderia Ferrari | Alfa Romeo | Alfa Romeo 6C-1750 GS | 1.8 L6 |
| Clemente Biondetti | Officine A. Maserati | Maserati | Maserati 26M | 2.5 L8 |
| René Dreyfus | Officine A. Maserati | Maserati | Maserati 26M | 2.5 L8 |
| Luigi Fagioli | Officine A. Maserati | Maserati | Maserati 26M | 2.5 L8 |
| Carlo Pedrazzini | Private entry | Maserati | Maserati 26B | 2.0 L8 |
| Hans Stuber | Private entry | Bugatti | Bugatti T35C | 2.0 L8 |