Azenia () was a deme of ancient Attica between Anaphlystus and Sunium.
It was probably situated in the bay of which Sunium forms the eastern cape. Opposite this bay is a small island, now called Patroklos (or Gaidouronisi), formerly the Island or Rampart of Patroclus (àñÃÂÃÂÃÂúûÿàÃÂìÃÂñþ or ýá¿ÂÃÂÿÃÂ), because a fortress was built upon it by Patroclus, who commanded on one occasion the ships of Ptolemy Philadelphus.