| Type: | GP |
| Grand Prix: | Masaryk |
| Date: | 26 September |
| Year: | 1937 |
| Official Name: | VII Masarykuv Okruh |
| Country: | CSK |
| Location: | Masaryk Circuit, Brno |
| Course Mi: | 18.107 |
| Course Km: | 29.140 |
| Distance Laps: | 15 |
| Distance Mi: | 271.6 |
| Distance Km: | 437.1 |
| Pole Driver: | Tazio Nuvolari |
| Pole Team: | Alfa Romeo |
| Pole Country: | Italy |
| Pole Flag Suffix: | 1861 |
| Grid From Ballot: | True |
| Fast Driver: | Rudolf Caracciola |
| Fast Team: | Mercedes-Benz |
| Fast Time: | 11:59.3 |
| Fast Country: | Germany |
| Fast Flag Suffix: | Nazi |
| First Driver: | Rudolf Caracciola |
| First Team: | Mercedes-Benz |
| First Country: | Germany |
| First Flag Suffix: | Nazi |
| Second Driver: | Manfred von Brauchitsch |
| Second Team: | Mercedes-Benz |
| Second Country: | Germany |
| Second Flag Suffix: | Nazi |
| Third Driver: | Hermann Paul Müller |
| Third Team: | Auto Union |
| Third Country: | Germany |
| Third Flag Suffix: | Nazi |
| Third Driver2: | Bernd Rosemeyer |
| Third Country2: | Germany |
| Third Flag Suffix2: | Nazi |
The 1937 Masaryk Grand Prix was a 750 kg Formula race held on 26 September 1937 at the Masaryk Circuit.
Rudolf Hasse and Achille Varzi did not race due to illness. Rosemeyer took the Auto Union into an early lead and von Brauchitsch couldn't match his skill on the gravel surface as he pulled away from the field. On lap five Lang lost control of his Mercedes and left the road and ploughed into some bystanders, killing two and injuring twelve. Unable to catch Rosemeyer von Brauchitsch let Caracciola past and the latter began catching the young Auto Union driver. In the end though it was unnecessary to pass him, Rosemeyer's brakes gave out and his race was over...or maybe not.
Müller had been in second place, but couldn't keep the Mercedes' behind and both Seaman and von Brauchitsch caught and passed him and he dropped to fourth. Back in the pits Rosemeyer took over Müller's car and immediately set about catching the now cruising Mercedes' drivers. Seaman was 48s ahead at the beginning of the final 29 km lap, Rosemeyer finished the lap 37s ahead of him! Von Brauchitsch was only another 5s ahead when they took the flag and Rosemeyer had an incredible 3rd place whilst Caracciola had the win.
| Pos | No | Driver | Team | Laps | Time/Retired | Grid | Points |
|---|---|---|---|---|---|---|---|
| 1 | 2 |  Rudolf Caracciola | Mercedes-Benz | 15 | 3:09:25.3 | 8 | |
| 2 | 4 | Manfred von Brauchitsch | Mercedes-Benz | 15 | + 36.4 | 5 | |
| 3 | 12 | Hermann Paul Müller/Bernd Rosemeyer | Auto Union | 15 | + 41.1 | 6 | |
| 4 | 6 |  Richard Seaman | Mercedes-Benz | 15 | + 1'18.5 | 7 | |
| 5 | 18 |  Tazio Nuvolari | Alfa Romeo | 14 | + 1 lap | 1 | |
| 6 | 20 | Antonio Brivio | Alfa Romeo | 14 | + 1 lap | 4 | |
| 7 | – |  László Hartmann | Maserati | 13 | + 2 laps | 9 | |
| 8 | – | Erno Festetics | Maserati | 12 | + 3 laps | 10 | |
| DNF | – | Paul Pietsch | Maserati | – | Crash | 12 | |
| DNF | – | Luigi Soffietti | Maserati | – | – | 13 | |
| DNF | 10 | Bernd Rosemeyer | Auto Union | 8 | Brakes | 3 | |
| DNF | 8 | Hermann Lang | Mercedes-Benz | 5 | Crash | 2 | |
| DNF | 28 | Renato Balestrero | Alfa Romeo | – | – | 11 | |