Aube, a department in the east of France comprising the southern part of the province of Champagne, and a smaller portion of Burgundy, and having an area of 2,317 square miles. It derives its name from the river Aube, a tributary of the Seine. The soil is chalky and barren in the N., but fertile in the S., producing wine, hemp, and roots. There are considerable forests, and quarries of building-stone and marble. Troyes is the capital.