Aube is a French department in the Grand Est region of north-eastern France. As with sixty departments in France, this department is named after a river: the Aube. With 310,242 inhabitants (2019), Aube is the 74th department in terms of population. The inhabitants of the department are known as Aubois or Auboises.

In the administrative divisions of France, the department is one of the three levels of government under the national level, between the administrative regions and the communes. Ninety-six departments are in metropolitan France, with an additional five constituting overseas departments, which are also classified as overseas regions. Departments are further subdivided into 333 arrondissements and 2,054 cantons. These last two levels of government have no political autonomy, instead serving as the administrative basis for the local organisation of police, fire departments as well as, in certain cases, elections.