In Greek mythology, Mideia (Ancient Greek: Μιδεία) or Midea (Ancient Greek: Μιδέα) may refer to:
- Midea, a Phrygian slave, mother of Licymnius by Electryon.
- Midea, a nymph, mother of Aspledon by Poseidon. The town Lebadea was believed to have previously been named Mideia after her.
- Midea, one of the Danaïdes. She married (and killed) Antimachus, son of Aegyptus.
- Midea, daughter of Aloeus and eponym of a city in Argos.