Eauze (French pronunciation: [eoz]; Gascon: Eusa) is a commune in the Gers department in southwestern France.

Located in the heart of south-west France, 130 kilometers from the Spanish border, Eauze is originally a proto-Basque city that became Roman.

On the other hand, summers are favorable to the strong heat and the proximity of the ocean accentuates the temperatures felt which regularly reach 35 to 38 °C.

Eauze is also home to the Bureau National Interprofessionel de l'Armagnac (BNIA), the Armagnac brandy's trade association.

The association of this drink with the town comes from one of the first recorded documents of eau de vie, written by Vital du Four, prior of Eauze, in about 1310.