Azeffoun, the classical Rusazus and colonial Port Gueydon, is a town and commune in Tizi Ouzou Province in northern Algeria, located on Cape Corbelin 64 km (40 mi) north-east of Tizi Ouzou.

[4] The economy of the town of Azeffoun is based on tourism, fishing, and agriculture.

Azeffoun is bounded by the Mediterranean Sea on the north, the town of Aït Chafâa on the east, and the common Akerrou, Aghrib in the south and Iflissen in the west.

The Phoenicians and Carthaginians established a fortress south of Cape Corbelin as part of their chain of colonies between the Strait of Gibraltar and their homelands.

Under Augustus, the town was notionally refounded as a Roman colony, receiving the name Rusazus Colonia Augusti to honor its imperial benefactor.