Los Millares is a Chalcolithic occupation site 17 km north of Almería, in the municipality of Santa Fe de Mondújar, Andalucía, Spain.

[4] The site covers 2 hectares (4.9 acres) and comprises three concentric lines of stone walls, the outer ring the largest, running more than 200 meters (650 feet) with nineteen 'bastions' and a gate guarded by foreworks.

Although primarily farmers, the inhabitants of Los Millares had crucially also learned metal working, especially the smelting and forming of copper, and the site is considered highly important in understanding the transition from the Neolithic to the Bronze Age.

The labor involved in its construction, the large volume of stones used, its geometric characteristics and sophisticated design all indicate multiple functionality, including defense and power.

[7] Similarities between Los Millares architecture and the step pyramid at Monte d'Accoddi in Sardinia have been noticed [citation needed].