The Department of Las Heras is located in the northwest sector of the Province of Mendoza, and its head city is located 5 kilometres from the capital. It forms part of the Great Mendoza, along with the Capital, the Godoy Cruz, the Guaymallén departments, and the urban portions of Lujan de Cuyo and Maipú. It is bordered on the north by the Province of San Juan, to the west with the neighbouring Republic of Chile; to the east with the departments of Lavalle, Guaymallén, Godoy Cruz and Capital; to the south with Lujan de Cuyo and Capital. Its continental climate allows the four seasons to be very well defined. The rainfalls happen in the summer and do not exceed 300 cubic millimetres per year. The winds are generally rare and mild, except in the area of the Uspallata Valley, where in the afternoon starts a persistent wind, as well as in the high mountain areas, especially during the winter season. The cloudiness is minimal and therefore this is an area of great luminosity. The economy of Las Heras is based on the commercial, industrial and tourism activities.
The Department of Las Heras consists of fifteen districts: the City of Las Heras or Head Village, Capdevila, El Resguardo, El Pastal, El Algarrobal, La Cieneguita, Panquehua, El Challao, El Zapallar, El Plumerillo, El Borbollón, Uspallata, Penitentes, Las Cuevas and Sierras de Encalada.