1921 Grand Prix season Other Grands Prix Other Grands Prix

| Name_ | Circuit | Date_ | Winning_driver | Winning_constructor | Report |
|---|---|---|---|---|---|
| Garda Circuit | Salò | 22 May | Eugenio Silvani | Bugatti | Report |
| Targa Florio | Madonie | 29 May | Giulio Masetti | Fiat | Report |
| Coppa della Cascine | Florence | 6 June | Deo | Chiribiri | Report |
| Mugello Circuit | Mugello | 24 July | Giuseppe Campari | Alfa Romeo | Report |
| Coppa Florio | Brescia | 4 September | Jules Goux | Ballot | Report |
| Gentlemen Grand Prix | Brescia | 11 September | Giulio Masetti | Mercedes | Report |
| Coppa Montenero | Montenero | 25 September | Corrado Lotti | Ansaldo | Report |