| Nieuport 21 | |
|---|---|
 | |
| General information | |
| Type | Fighter |
| Manufacturer | Nieuport |
| Primary users | Aéronautique Militaire |
| History | |
| Introduction date | 1916 |
| Retired | 1920s |
| Developed from | Nieuport 17 |
The Nieuport 21 (or Nieuport XXI C.1 in contemporary sources) was a French single-seat, single-engine fighter aircraft used during World War I. The aircraft was used by the French, Russian, British and American air forces. After the war, the Nieuport 21 was a popular civil aircraft.