Castillo Copper Limited engages in the exploration and examination of mineral properties in Australia and Zambia. The company primarily explores for copper, silver, lead, and zinc deposits. It holds a 100% interest in the NWQ Copper project in the Mt Isa copper-belt of Queensland, Australia; the Mkushi, the Luanshya, the North and South Lumwana, and the Mwansa projects covering approximately 1,100 square kilometers in Zambia; the Broken Hill, a zinc-silver-lead project in New South Wales, Australia; and a 100% interest in the Cangai copper project in New South Wales, Australia. The company was incorporated in 2009 and is based in West Perth, Australia.