Justus Grassmann | |
|---|---|
| Born | c. 1895–96 |
| Died | 2 November 1961 |
| Allegiance | Germany |
| Service | Luftstreitkräfte |
| Rank | Leutnant |
| Unit | Flieger-Abteilung (Flier Detachment) 32; Jagdstaffel 10 (Fighter Squadron 10) |
| Awards | Royal House Order of Hohenzollern; Iron Cross First Class |
Leutnant Justus Grassmann (c. 1895–96 – 2 November 1961) was a World War I flying ace credited with ten aerial victories—seven enemy airplanes and three observation balloons.