| Unit Name: | 20th Fighter Wing |
| Native Name: | Jagdgeschwader 20 |
| Dates: | 1939–1940 |
| Country: | Nazi Germany |
| Garrison: | Jesau |
| Colours: | --> |
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Jagdgeschwader 20 (JG 20) was a Luftwaffe fighter wing during the early phase of World War II in Europe. JG 20 was founded on 15 July 1939 in Döberitz, composed of one Gruppe and two Staffeln. A third Staffel was added on 5 November 1939 in Brandenburg-Briest. The sole Gruppe was redesignated as 3rd Gruppe of Jagdgeschwader 51 (III./JG 51) on 4 July 1940. During the Battle of France it was subordinated to Luftflotte 2. The unit's commanders included Hauptmann Hannes Trautloft, from 19 September 1939 to 4 July 1940.