Aci Castello is a city in the Province of Catania in Sicily, Italy. The city is located 9 km north of Catania on the Mediterranean coast. The primary economic sectors are agriculture and industry (in Catania).

The city developed around the castle, which was built in 1076 by the Normans. In 1169, Aci Castello started to grow after an eruption of Mount Etna made the towns around it uninhabitable. (from Wikipedia Lexikon)