Physadeia (Ancient Greek: Φυσάδεια) is a name in Greek mythology that may refer to:

• Physadeia, a Libyan princess as one of the Danaids, daughters of King Danaus, who, like her sister Amymone, gave her name to a freshwater source (The well of Physadeia near Argos).^[1]
• Physadeia, sister of Pirithous.^[2] When the Dioscuri had taken Helen back to Sparta, they had taken captive Physadeia and Aethra, Theseus' mother. These women became handmaidens of Helen and later followed her to Troy.

• Callimachus, Callimachus and Lycophron with an English translation by A. W. Mair ; Aratus, with an English translation by G. R. Mair, London: W. Heinemann, New York: G. P. Putnam 1921. Internet Archive
• Callimachus, Works. A.W. Mair. London: William Heinemann; New York: G.P. Putnam's Sons. 1921. Greek text available at the Perseus Digital Library.
• Gaius Julius Hyginus, Fabulae from The Myths of Hyginus translated and edited by Mary Grant. University of Kansas Publications in Humanistic Studies. Online version at the Topos Text Project.