The capture of Peñón of Algiers was accomplished when the beylerbey of Algiers, Hayreddin Barbarossa captured the fortress called Peñón of Algiers, on a small islet facing the Algerian city of Algiers from the Habsburg Spaniards.

Hayreddin Barbarossa, also known as Hayreddin Pasha, Hızır Hayrettin Pasha, and simply Hızır Reis, was an Ottoman corsair and later admiral of the Ottoman Navy. Barbarossa's naval victories secured Ottoman dominance over the Mediterranean during the mid-16th century.