Bordered on the north by the department Trancas, east to Burruyacú and Cruz Alta, south of Capital, Yerba Buena and Lules, and west to Tafí del Valle.
Until 1888, the town of San Miguel de Tucumán covered from Catamarca to Santiago del Estero.
In the past the railway workshops located in the city of Tafí Viejo were the engine of the departmental economy.
The city of Tafí Viejo is third in number of inhabitants in the province, second only to Concepción, and the capital, San Miguel de Tucumán.
The recent growth of fruit production has led to the abundant incorporation of lemon juice or grated of it to many traditional dishes, being recognized in neighboring regions of his outstanding use.