Royal Prussian Jagdstaffel 31 was a World War I "hunting group" (i.e., fighter squadron) of the Luftstreitkräfte, the air arm of the Imperial German Army during World War I.

As one of the original German fighter squadrons, the unit would score 35 verified aerial victories, including five wins over enemy observation balloons.

[1] Royal Prussian Jagdstaffel 31 was formed on 14 December 1916 at Breslau, the site of the FEA II training unit in the 3rd Armee Sector.

It was then shifted back to the Western Front on 7 March, and there completed its war.

[1] One member of Jasta 31 was a recipient of the Royal House Order of Hohenzollern and Iron Cross: Two members were Iron Cross winners: Two other aces served with the squadron: Jasta 31 used the Albatros D.III, D.III (OAW), Albatros D.V and Roland D.II fighters.