Lozère is a landlocked department in the region of Occitanie in Southern France, located near the Massif Central, bounded to the northeast by Haute-Loire, to the east by Ardèche, to the south by Gard, to the west by Aveyron, and the northwest by Cantal. It is named after Mont Lozère. With 76,604 inhabitants as of 2019, Lozère is the least populous French department.

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.