Fray Justo Santa María De Oro Department
Fray Justo Santa María de Oro is the most south western department of Chaco Province in Argentina.
The provincial subdivision has a population of about 10,500 inhabitants in an area of 2,205 km², and its capital city is Santa Sylvina, which is located around 1,000 km from the Capital federal.
It takes its name from Justo de Santa María de Oro.