Arauco Postal Codes: 4350000 to 4410000 | Bío-Bío

Key Facts

Arauco is a province located in the Bío-Bío Region of central Chile, situated along the country's Pacific coastline. Geographically positioned in the northwestern part of the Bío-Bío Region, Arauco occupies a strategic location that includes both coastal areas and inland territories, characterized by its diverse landscapes ranging from coastal plains to the foothills of the Nahuelbuta mountain range. The province covers approximately 5,457 square kilometers and has a population of around 157,000 people according to recent estimates, making it one of the smaller but historically significant provinces in the region. Arauco is administratively divided into 7 communes or municipalities, each with its own distinct character and local governance structure. The province takes its name from the Arauco Peninsula and has deep historical roots, being the traditional territory of the Mapuche people and the site of the Arauco War during the Spanish colonial period. Today, the province maintains a mixed economy with significant contributions from forestry, fishing, and agriculture, while also preserving important natural areas and cultural heritage sites. For those seeking detailed postal and administrative information, comprehensive postal code data is available for all of Arauco's constituent communes and their subdivisions.

Neighboring Regions

• Concepción
• Bío-Bío
• Malleco