Area………….. 8.510 km2
Population…….. 16.099 habitantes
Density……….. 1.90 hab./km2
The Department Santa Rosa is located in the northeast portion of the province, 81 kilometres from the capital city of Mendoza.
It is bordered in the north by the departments of Lavalle and San Martin, in the south by San Rafael, in the east by La Paz, and in the west by Junín, Rivadavia, and San Carlos.
It is divided into 5 districts: 12 de Octubre, Las Catitas, Ñanuñan, La Dormida, and Villa Santa Rosa.
Its climate is semiarid, with a tendency to be warm in most of the territory, and with a tendency to be cool in the extreme south.
The Tunuyán River is the largest of the department and it runs through the northeast to the southwest, with occasional appreciable flows in the summer, under the influence of the rain.
The Department is part of the so-called Gran Llañura de la Travesía, a large basin of fluvial sedimentation from the Tertiary and Quaternary.
The plain is presented as a flat surface with a slight tilt toward the east, and there are many dunes, especially in the eastern part of the Department.
The flora is represented in its majority by algarrobo dulce, zampa, and jarilla, among others.