In Greek mythology, Glauce (; Ancient Greek: Γλαυκή "blue-gray"), LatinGlauca, refers to different people:
- Glauce, daughter of Creon. She married Jason. She was killed, along with her father, by Medea, who either sent her a peplos steeped in flammable poison or set fire to the royal palace. In the local Corinthian tradition, Glauce threw herself into a well in a vain attempt to wash off Medea's poison; from this circumstance the well became known as the Well of Glauce. Also known by the name Creusa, predominantly in Latin authors, e.g. Seneca (Medea) and Propertius (2.16.30). Hyginus (Fab. 25) uses both names interchangeably.
- Glauce, one of the Nereids.
- Glauce, one of the Danaids, daughter of Danaus. She married Alces, son of Aegyptus and an Arabian woman.
- Glauce, daughter of Cychreus, son of Poseidon and Salamis. Some sources say that Glauce married Actaeus and bore him a son Telamon. Others say that Telamon was her husband and that, after her death, he married Periboea, mother of Ajax.
- Glauce, an Arcadian nymph, one of the nurses of Zeus.
- Glauce, an Amazon. Some say that it was she, and not Antiope, who was abducted by Theseus and became his wife.
- Glauce, daughter of Cycnus, sister of Cobis and Corianus. During the Trojan campaign, she was taken captive by the Greeks and was given to Ajax, by whom she became mother of Aeantides.
- Glauce, one of the Melian nymphs.
- Glauce, mother, by Upis, of "the third" Artemis in Cicero's rationalized genealogy of the Greek gods.
- Glauce, twin sister of Pluto who died as an infant according to Euhemerus.
Glauce is a genus of moth in the family Gelechiidae. It contains only one species, Glauce pectenalaeella, which is found in North America, where it has been recorded from Alabama, Arkansas, Florida, Illinois, Indiana, Kentucky, Louisiana, Maine, Mississippi, Quebec, South Carolina, Tennessee, Texas and West Virginia.
The wingspan is about 12 mm. The ground color is pale yellowish, almost entirely obscured by dense fuscous dusting and fuscous spots. The apex of the forewings is more deeply fuscous.