Cybele ( SIB-ə-lee; Phrygian: Matar Kubileya/Kubeleya "Kubileya/Kubeleya Mother", perhaps "Mountain Mother"; Lydian Kuvava; Greek: Κυβέλη Kybele, Κυβήβη Kybebe, Κύβελις Kybelis) is an Anatolian mother goddess; she may have a possible forerunner in the earliest neolithic at Çatalhöyük, where statues of plump women, sometimes sitting, accompanied by lionesses, have been found in excavations. Phrygia's only known goddess, she was probably its national deity. Greek colonists in Asia Minor adopted and adapted her Phrygian cult and spread it to mainland Greece and to the more distant western Greek colonies around the 6th century BC.

In Greece, Cybele met with a mixed reception. She became partially assimilated to aspects of the Earth-goddess Gaia, of her possibly Minoan equivalent Rhea, and of the harvest–mother goddess Demeter. Some city-states, notably Athens, evoked her as a protector, but her most celebrated Greek rites and processions show her as an essentially foreign, exotic mystery-goddess who arrives in a lion-drawn chariot to the accompaniment of wild music, wine, and a disorderly, ecstatic following. Uniquely in Greek religion, she had a eunuch mendicant priesthood. Many of her Greek cults included rites to a divine Phrygian castrate shepherd-consort Attis, who was probably a Greek invention. In Greece, Cybele became associated with mountains, town and city walls, fertile nature, and wild animals, especially lions.

In Rome, Cybele became known as Magna Mater ("Great Mother"). The Roman state adopted and developed a particular form of her cult after the Sibylline oracle in 205 BC recommended her conscription as a key religious ally in Rome's second war against Carthage (218 to 201 BC). Roman mythographers reinvented her as a Trojan goddess, and thus an ancestral goddess of the Roman people by way of the Trojan prince Aeneas. As Rome eventually established hegemony over the Mediterranean world, Romanized forms of Cybele's cults spread throughout Rome's empire. Greek and Roman writers debated and disputed the meaning and morality of her cults and priesthoods, which remain controversial subjects in modern scholarship.