Aube (French pronunciation: [ob]) is a French department in the Alsace-Champagne-Ardenne-Lorraine region of north-eastern France. As with sixty departments in France, this department is named after a river: the Aube. With 305,606 inhabitants (2012), Aube is 76th department in terms of population. The inhabitants of the department are known as Aubois or Auboises
The department was constituted as it is today by a decree of the National Assembly of 15 January 1790.
The Aube department is located in the south-west side of the Alsace-Champagne-Ardenne-Lorraine region. It borders the departments of Marne in the north (about 130 km long), Haute-Marne to the east (about 100 km long), Côte-d'Or in the south-east (about 45 km long), Yonne in the south-west (about 175 km long), and Seine-et-Marne in the west (about 45 km long).
Within the department regions of natural or traditional countryside can be identified as follows: