Entre Ríos, Tarija
|Province||Burdett O'Connor Province|
Entre Ríos is the administrative center of O'Connor Province. It is located at 1,230 m at the confluence of Río Tambo and one of its tributaries, 110 km and a three-hour ride east of Tarija, the departmental capital. The town is bordered by north-southerly mountain ranges and situated in an elongated triangular hollow of 10 km length. It was previously called San Luis.
The average yearly temperature of Entre Ríos is 20.9 °C, the yearly precipitation of 1,300 mm appears mainly in the summer's wet season from January to March.
Entre Ríos' population at the 2001 census was 2.413 inhabitants, and has risen to circa 2,800 people in 2007. The Entre Ríos region is still one of the main settlement areas of the Guaraní people who have inhabited the Paraná Basin for millennia.