Al-Hakam II (al-Ḥakam II ibn ʿAbd al-Raḥmān III; Arabic: الحكم الثاني‎) (January 13, 915 – October 16, 976) was the second Caliph of Cordoba, in Al-Andalus (Moorish Iberia), and son of Abd-ar-rahman III (al-Nasir). He ruled from 961 to 976.

Al-Hakam II succeeded to the Caliphate after the death of his father Abd ar-Rahman III in 961. He secured peace with the Christian kingdoms of northern Iberia, and made use of the stability to develop agriculture through the construction of irrigation works. Economic development was also encouraged through the widening of streets and the building of markets.

He was fond of books and learning, and amassed a vast library with 400,000 books (this was sacked in the Berber siege of Cordoba in 1100). He even sent his agents to purchase 'first edition' books from the Muslim east, such as Kitab al-Aghani (Book of Songs) by Abu al-Faraj al-Isfahani.

During his reign, a massive translation effort was undertaken, and many books were translated from Latin and Greek into Arabic. He formed a joint committee of Arab Muslims and Iberian Mozarab Christians for this task.

His building works included an expansion of the main mosque of Cordoba (962–966), the Mezquita, and the completion of the Royal residence Medina Azahara (976), which Abd ar-Rahman III had begun in 936.