| Type: | GP |
| Grand Prix: | Italian |
| Date: | 4 Sep |
| Year: | 1921 |
| Official Name: | I Gran Premio d'Italia |
| Country: | Italy |
| Flag Suffix: | 1861 |
| Location: | Montichiari, Italy |
| Course: | Montichiari |
| Course Mi: | 10.75 |
| Course Km: | 17.30 |
| Distance Laps: | 30 |
| Distance Mi: | 322.5 |
| Distance Km: | 519 |
| Pole Driver: | Louis Wagner |
| Pole Country: | France |
| Pole Team: | Fiat |
| Grid From Number: | True |
| Fast Driver: | Pietro Bordino |
| Fast Team: | Fiat |
| Fast Time: | 6:54.2 |
| Fast Country: | Italy |
| Fast Flag Suffix: | 1861 |
| First Driver: | Jules Goux |
| First Team: | Ballot |
| First Country: | France |
| Second Driver: | Jean Chassagne |
| Second Team: | Ballot |
| Second Country: | France |
| Third Driver: | Louis Wagner |
| Third Team: | Fiat |
| Third Country: | France |
The 1921 Italian Grand Prix was a Grand Prix motor race held on the Circuito della Fascia d’Oro at Montichiari, near Brescia, on 4 September 1921.[1]
| Pos | No | Driver | Car | Laps | Time/Retired | |
|---|---|---|---|---|---|---|
| 1 | 11 |  Jules Goux | Ballot 3L | 30 | 3h35m09 | |
| 2 | 8 | Jean Chassagne | Ballot 3L | 30 | 3h40m52 | |
| 3 | 2 | Louis Wagner | Fiat 802 | 30 | 3h45m33 | |
| Ret | 4 |  Ralph DePalma | Ballot 3L | 21 | Mechanical | |
| Ret | 10 |  Ugo Sivocci | Fiat 802 | 18 | Engine | |
| Ret | 6 | Pietro Bordino | Fiat 802 | 16 | Magneto |