Here is a partial list of women who were known to be involved with Zeus:
APHRODITE The Goddess of Love and Beauty was pursued by Zeus when she first emerged from the sea but managed to escape him. According to some, she later had an affair with the god, and through the curses of Hera bore a deformed son: the god Priapus (most sources however say his father was Dionysus).
ASTERIA A Titan goddess who was pursued by the lustful Zeus across the heavens. She assumed many forms to escape him, but eventually leapt from the heavens in the shape of a quail, and metamorphosed into the island of Delos.
DEMETER The Goddess of Agriculture and Zeus mated in the form of intertwining serpents. From this union the goddess Persephone was born (some say Dionysus was also their son).
DIONE A Titaness who, according to some, bore Zeus the goddess Aphrodite (though most accounts say she was born in the sea, grown from the severed genitalia of Uranus). An even rarer account, makes her the mother of Dionysus, also by Zeus (again contrary to the usual tradition where Dionysus' mother is Semele).
EURYNOME A Titan goddess who was the mother by Zeus of the three Graces and, according to some, the river-god Asopos.
GAEA The Goddess of the Earth was accidentally impregnated by Zeus on two separate occasions: in Phrygia where she gave birth to the goddess Agdistis, and in Kypros where she bore the Kentauroi Kyprioi.
HERA The Queen of the Gods wed Zeus in a secret ceremony back in the days of the Titan-War. She bore him several divine children: Ares, Hephaestus, and Hebe (and possibly also Eris and Illythia).
HYBRIS The Goddess of Excessive Pride was, according to some, the mother by Zeus of Pan (though he is usually called a son of Hermes and Penelopeia).
KALLIOPE A Goddess of epic poetry and one of the nine Muses was, according to one account, the mother of the Korybantes (or Kabeiroi) by Zeus (however, these gods were usually called sons of some other god).
LETO A Titan goddess who was loved by Zeus. She bore him the twin gods Apollo and Artemis.
METIS The Titan goddess of Good Counsel was impregnated by Zeus who then swallowed her whole upon learning of a prophecy that she was destined to bear a son greater than his father. She gave birth to Athena within the belly of the god, who later emerged fully grown from the skull of Zeus.
MNEMOSYNE The Titaness of Memory was seduced by Zeus in the disguise of a shepherd. He lay with her for nine nights and gave birth to the nine goddesses known as Muses.
NEMESIS The Goddess of Retribution was seduced by Zeus in the form of a swan. After their union she laid the egg from which Helen of Troy was hatched. (Leda, who was also known as Helen's mother and was also seduced by Zeus, found the egg containing Helen).
PERSEPHONE The Goddess of Spring (before her abduction to Haides) was seduced by Zeus in the form of a serpentine Drakon. She bore him a son, the short-lived god Zagreos. Later, as goddess of the underworld, she was again seduced by Zeus but this time disguised as her husband Hades.
SELENE The Goddess of the Moon bore Zeus two daughters: Pandia and Ersa.
STYX The Goddess of the great Underworld River Styx.
THEMIS The Titaness of Custom and Tradition was one of the first wives of Zeus. She bore him two sets of offspring: the three Horai (Seasons also representing Justice, Peace, Good Governance), the three Moirai (Fates), and in some accounts, of three prophetic Nymphai.
THETIS A Goddess of the Sea who was wooed by Zeus. The god abandoned his attempts to seduce her when it was revealed that she was destined to bear a son greater than his father.
AIGINA A Naias Nymphe of the Argolis (in Southern Greece) who was abducted by Zeus in the shape of a eagle to the island of Aigina where she bore him a son named Aiakos.
AIX (or BOETIS) The Nymphe wife of the god Pan who assumed the form of a she-goat to escape the attentions of Zeus. The god seduced her in this form and she bore him the godling Aegipan (Goat-Pan).
BORYSTHENES' DAUGHTER A Naias of the River Borysthenes in Skythia (North-Eastern Europe) who was loved by Zeus and bore him a son Targitaus.
DEINO The Nymphe mother by Zeus of certain Nymphai.
ELEKTRA A Pleiad Nymphe of the island of Samothrake (in the Greek Aegean), who was loved by Zeus and bore him several sons: Dardanos, Emathion, Iasion.
HIMALIA A Nymphe of the Island of Rhodes (in the Greek Aegean) who bore Zeus three sons named Spartaios, Kytos and Kronios.
HORA A Nymphe of the Tauric Khersonese [in North-Eastern Europe] who was loved by Zeus and bore him a son Kolaxes.
IO A Naias Nymphe of the Argolis (in Southern Greece) who was loved by Zeus. She was transformed into a heifer by Zeus and driven under torment by Hera all the way to Aigyptos (Egypt in North Africa). There she bore Zeus a son, Epaphos. Some say that she also gave birth to a daughter on the Straits of Bosporos (Asia Minor) named Keroessa.
KALLIRHOE A Naias Nymphe of Akarnania (in Central Greece) who was loved by Zeus. No offspring are mentioned of their union, although she did obtain favours from the god for her mortal fathered sons.
KARME An Agricultural Nymphe, Lady of Krete (in the Greek Aegean) or Princess of Phoinikia (in West Asia) who was loved by Zeus and bore him a daughter named Britomartis.
MAIA A Pleiad Nymphe of Arkadia's Mt Kyllene (Southern Greece). She was loved by Zeus and bore him the god Hermes.
NYMPHE AFRICAN A Nymphe of the land of the Moors (in North Africa) who was the mother of Iarbos by Zeus.
NYMPHE SITHNIS A Naias Nymphe of Megaros (in Southern Greece), one of the Sithnides. She was the mother by Zeus of Megaros.
NYMPHE SAMOTHRAKIAN A Nymphe of the island of Samothrake (in the Greek Aegean) who, according to some was the mother of Saon by Zeus.
OTHREIS A Nymphe of Malis (in Northern Greece) who was loved by Zeus and bore him a son named Meliteus.
PLOUTO An Okeanis Nymphe (and Goddess of Wealth) who bore Zeus a son named Tantalos.
SINOPE A Naias Nymphe of the Argolis (in Southern Greece) who was abducted to Assyria (in Asia Minor) by Zeus. He promised her the fulfillment of a wish, and she declared "I wish to remain a virgin".
TAYGETE A Pleiad Nymphe of Lakedaimonia's Taygetos Mountain range (in Southern Greece). She was loved by Zeus and bore him a son named Lakedaimon.
THALEIA A Nymphe of Sikelia (Sicily in Southern Italia) who was loved by Zeus and prayed the god hide her beneath the earth to avoid the jealous wrath of Hera. Their sons were the twin Palikoi gods. (According to others, the Palikoi were sons of Hephaistos).
ALCMENE A Lady of Thebes in Boiotia (Central Greece) who was seduced by Zeus in the form of her own husband. She bore twins: Heracles by Zeus and Likymnios by her husband Amphitryon.
ANTIOPE A Lady of Thebes in Boiotia (Central Greece) who was seduced by Zeus in the shape of Satyros. She bore him twin sons Amphion and Zethos which were exposed at birth.
DANAE A Princess of Argos (in Central Greece) who was imprisoned by her father in a bronze tower. Zeus seduced her in the form of a golden shower, and she gave birth to a son, the hero Perseus.
DIA A Queen of the Lapith tribe of Thessalia (in Northern Greece), wife of King Ixion. According to some, she was seduced by Zeus, and bore him a son Peirithoos (but others say, the father was her husband Ixion).
ELARE A Princess of Orkhomenos (in Central Greece) who was loved by Zeus. In fear of the wrath of Hera, he hid her beneath the earth, where she gave birth to a son the Gigante Tityos.
EUROPA A Princess of Phoinikia (Phoenicia in West Asia) who was abducted to Krete )in the Greek Aegean) by Zeus in the form of a bull. She bore him three sons: Minos, Sarpedon and Rhadamanthys.
EURYMEDOUSA A Princess of Phthiotis (in Northern Greece) who was seduced by Zeus in the form of an ant. Their son was named Myrmidon (Ant-Man).
KALLISTO A Princess of Arkadia (in Southern Greece) who was seduced by Zeus in the guise of the goddess Artemis. She was transformed into a bear by a wrathful goddess into a bear and in this form bare a son named Arkas.
KALYKE A Queen of Elis (in Southern Greece), the wife of King Aithlios. She was the mother by Zeus (or by her husband Aithlios) of Endymion.
KASSIOPEIA A Lady of Krete (in the Greek Aegean) who bore Zeus a son named Atymnios.
LAMIA A Queen of Libya (in North Africa) who was loved by Zeus. When the jealous Hera stole her children by the god - Herophile and Akhilleus - she was driven mad with grief.
LAODAMEIA A Princess of Lykia (in Asia Minor) who was loved by Zeus and bore him a son, Sarpedon.
LEDA A Queen of Lakedaimonia (in Southern Greece) who was seduced by Zeus in the form of swan. She laid an egg from which were hatched the Dioskouroi twins - one Polydeukes was the son of Zeus, the other Kastor the son of her husband Tyndareus. According to some, she was also the mother of egg-hatched Helene (though others say this egg was given her by the goddess Nemesis).
LYSITHOE A woman who bore Zeus a son named Herakles (a man with the same name as the famous hero).
NIOBE A Princess of Argolis (in Southern Greece). She was the very first mortal woman loved by Zeus, and bore him two sons: Argos and Pelasgos (though according to others Pelasgos was a son of Poseidon or Earth-Born).
OLYMPIAS An (historical) Queen of Makedonia, and mother of Alexandros the Great. According to legend, her son was fathered by the god Zeus.
PANDORA A Princess of the Hellenes, one of the daughters of King Deukalion, surviver of the Great Deluge. She was loved by Zeus and bore him sons Latinos and Graikos.
PROTOGENEIA A Princess of the Hellenes, one of the daughters of King Deukalion, surviver of the Great Deluge. She was loved by Zeus and bore him a son Aithlios.
PYRRHA The wife of King Deukalion of the Hellenes, who with her husband survived the Great Deluge. According to some, her first born son, Hellen, was fathered by Zeus rather than Deukalion.
SEMELE A Princess of Thebes in Boiotia (Central Greece) who was loved by Zeus, but through the machinations of Hera was consumed by the heat of his lightning bolts. Zeus rescued their unborn son, Dionysus, from her body and sewed him up in his thigh until he was old enought to be born.
THYIA A Princess of the Hellenes, one of the daughters of King Deukalion, surviver of the Great Deluge. She was loved by Zeus and bore him sons Magnes and Makedon.