Gerhard Loos (21 August 1916 – 6 March 1944) was a German military aviator who served in the Luftwaffe during World War II.

Following flight training, he served as an instructor before being posted to Jagdgeschwader 54 (JG 54—54th Fighter Wing) in late 1942, operating on the Eastern Front.

By late September 1943, his number of aerial victories had increased to 83 and was transferred to the Western Front.

He was killed in action on 6 March 1944 in aerial combat with United States Army Air Forces fighters near Oldenburg.

In late 1942, Loos was posted to I. Gruppe (1st group) of Jagdgeschwader 54 (JG 54—54th Fighter Wing) based on the Eastern Front.

In February, the Gruppe converted from the Messerschmitt Bf 109 G-2 to the radial engine powered Focke-Wulf Fw 190 A-4 fighter aircraft.

[6] In early July, I. Gruppe of JG 54 was ordered to move to Oryol, in the southern sector of Army Group Centre, where it fought in Operation Citadel which initiated the Battle of Kursk.

[10] On 4 August, supporting German forces fighting at Oryol, the Gruppe claimed 25 aerial victories, including six by Loos, his second "ace-in-a-day" achievement.

That day, the United States Army Air Forces (USAAF) VIII Bomber Command targeted Bremen in northern Germany.

Gruppe was scrambled at 11:10 and intercepted the bombers and their fighter escorts at 12:00 in the area of Bremen following their bomb run.

[19] On 6 March, Loos flying Bf 109 G-6 (Werknummer 411922—factory number) was shot down in aerial combat near Reinsehlen.

[23] Mathews and Foreman, authors of Luftwaffe Aces — Biographies and Victory Claims, researched the German Federal Archives and found records for 84 aerial victory claims, all but one four-engined heavy bomber on the Eastern Front.