| General Janusz Gąsiorowski | |
| Order: | Chief of the General Staff |
| Term Start: | 3 December 1931 |
| Term End: | 7 June 1935 |
| Predecessor: | Tadeusz Piskor |
| Successor: | Wacław Stachiewicz |
| Birth Date: | 17 June 1889 |
| Birth Place: | Lemberg, Galicia and Lodomeria, Austria-Hungary (modern-day Lviv, Ukraine) |
| Death Place: | Paris, France |
| Branch: | 20pxPolish Legions 20pxPolish Armed Forces |
| Serviceyears: | 1912–1939 |
| Rank: | Brigadier General |
| Battles: | First World War Polish–Soviet War Invasion of Poland |
| Commands: | 7th Infantry Division |
| Resting Place: | Cimetière des Champeaux de Montmorency |
Janusz Gąsiorowski (1889 – 1949; born in Lemberg) was a Polish general, commander of the Polish 7th Infantry Division during the German invasion of Poland in 1939. Taken prisoner on 4 September in the battle of Częstochowa.[1] He was awarded the Serbian Order of Saint Sava and a number of other decorations.[2]