Amalthea may refer to:
Amalthea (mythology), the foster-mother of Zeus in Greek mythology Amalthea (moon), a moon of Jupiter 113 Amalthea, a main-belt asteroid The Cumaean Sibyl or Amalthea, a priestess presiding over the Apollonian oracle at Cumae, a Greek colony near Naples, Italy Lady Amalthea, a character in The Last Unicorn Amalthea Cellars, a winery in New Jersey, United States
Ships Amalthea (1863), a barquentine bombed by Anton Nilson in 1908 Amalthea (1881), a steam yacht built as Iolanthe, renamed Amalthæa, and later renamed (1985), a cargo ship