In Greek mythology, Auge (/ˈɔːdʒiː/; Ancient Greek: Αὐγή, romanized: Augḗ, lit. 'sunbeam, daylight, dawn';), was the daughter of Aleus the king of Tegea in Arcadia, and the virgin priestess of Athena Alea. She was also the mother of the hero Telephus by Heracles.

Auge had sex with Heracles (either willingly, or by force) and was made pregnant. When Aleus found this out, by various accounts, he ordered Auge drowned, or sold as a slave, or shut up in a wooden chest and thrown into the sea. However, in all these accounts, she and her son Telephus end up at the court of the Mysian king Teuthras, where Auge becomes the wife (or the adopted daughter) of Teuthras, and Telephus becomes Teuthras’ adopted son and heir.

Auge was the daughter of Aleus, the grandson of Arcas, who was the son of Zeus and Callisto. Aleus was the king of Arcadia and eponym of Alea, and was said to have been the founder of the cult of Athena Alea and the builder of Temple of Athena Alea at his capital of Tegea. According to the mythographer Apollodorus, Auge's mother was Neaera, the daughter of Pereus.

There were many versions of Auge's story. A surviving fragment of the Hesiodic Catalogue of Women (6th c. BC), representing perhaps the oldest tradition, tells us that, Auge having arrived in Mysia (it doesn't say how), the gods appeared before king Teuthras and commanded him to receive her at his court in Mysia. So, according to this account, Teuthras raised Auge as a daughter, and It was in Mysia that Heracles, while seeking the horses of Laomedon, seduced Auge and fathered Telephus.

All other accounts place the seduction (or in later accounts, the rape) of Auge by Heracles and Telephus' birth in Arcadia, in the Peloponnese of mainland Greece. The oldest such account (c. 490–480 BC), by the historian and geographer Hecataeus, says that Heracles used to have sex with Auge whenever he came to Tegea. We are told this by the 2nd century geographer Pausanias, who goes on to say, perhaps drawing upon Hecataeus, that when Aleus discovered that Auge had given birth to Telephus, he shut mother and child up in a chest and threw it into the sea. The chest made its way from Arcadia to the Caicus river in Asia Minor, where the local king Teuthras married Auge.

Sophocles, in the fifth century BC, wrote a tragedy Aleadae (The sons of Aleus), which told the story of Auge and Telephus. The play is lost and only fragments now remain, but a declamation attributed to the fourth century BC orator Alcidamas probably used Sophocles' Aleadae for one of its sources. According to Alcidamas, Auge's father Aleus had been warned by the Delphic oracle that if she had a son, then her son would kill Aleus' sons, so Aleus made Auge a priestess of Athena, telling her she must remain a virgin, on pain of death. But Heracles passing through Tegea, being entertained by Aleus in the temple of Athena, became enamored of Auge and while drunk had sex with her. Aleus discovered that Auge was pregnant and gave her to Nauplius to be drowned. But, on the way to the sea, Auge gave birth to Telephus on Mount Parthenion, and according to Alcidamas, Nauplius, ignoring his orders, sold mother and child to the childless Mysian king Teuthras, who married Auge and adopted Telephus. Alcidamas' version of the story must have diverged from Sophocles in at least this last respect. For, rather than the infant Telephus being sold to Teuthras, as in Alcidamas, an Aleadae fragment seems to insure that in the Sophoclean play, as in many later accounts (see below), the new-born Telephus was instead abandoned on Mount Parthenion, where he is suckled by a deer.

Euripides wrote a play Auge (408 BC?) which dealt with her story. The play is lost, but a summary of the plot can be pieced together from various later sources, in particular a narrative summary, given by the Armenian historian Moses of Chorene. A drunken Heracles, during a festival of Athena, rapes "Athena's priestess Auge, daughter of Aleus, as she conducted the dances during the nocturnal rites." Auge gives birth secretly in Athena's temple at Tegea, and hides the new-born child there. The child is discovered, and Aleus orders Telephus exposed and Auge to be drowned, but Heracles returns and apparently saves the pair from immediate death, and the play perhaps ended with the assurance (from Athena to Heracles?) that Auge and Telephus would be wife and son to Teuthras.

Strabo, gives a version of the story similar to Pausanias', saying that, after discovering "her ruin by Heracles", Aleus put Auge and Telephus into a chest and cast it into the sea, that it washed up at the mouth of the Caicus, and that Teuthras married Auge, and adopted Telephus.