Graneros has a total area of 1,678 km².
Two rivers, the Marapa and San Francisco, flow across the department and empty in the Rio Hondo Lake in the northeast end.
There are hot springs in the Taco Ralo area.
It also borders the provinces of Santiago del Estero in the east and Catamarca in the south.
This article about a place in Tucumán Province, Argentina is a stub.