In Greek mythology, Sthenelus (Ancient Greek: Σθένελος, Sthenelos) was a name attributed to several different individuals.
Sthenelus was the father of Cycnus and King of Liguria.
Sthenelus was the son of Aegyptus and Tyria, who married (and was killed by) Sthenele, daughter of Danaus and Memphis.
Sthenelus or Sthenelās was the father of Gelanor.
Sthenelus, son of Perseus and Andromeda, and king of Mycenae. By Nicippe, daughter of Pelops and Hippodamia, he fathered Eurystheus, Medusa and Alcyone.
Sthenelus, son of Actor (or of Androgeos) and a companion of Heracles, whom he accompanied to the land of the Amazons to steal Hippolyte's girdle.
Sthenelus, son of Capaneus and Evadne, he fought alongside Diomedes and the other Argives in the Trojan War and was one of the men who hid in the Trojan horse. In the Iliad, he boasts that he captured the city of Thebes, while his father, fighting among the Seven Against Thebes, died attempting the same thing. He ruled half of Argos, along with Diomedes, after both Adrastus and Aegialeus had died. His sons were Cylarabes and Cometes.