Alcinous may refer to several people from classical myth and history:

• Alcinous, mythological king featured prominently in Homer's Odyssey
• Alcinous, son of Hippocoon, who with his father and brothers, expelled Icarius and Tyndareus from Lacedaemon, but was afterwards killed by Heracles
• Alcinous (philosopher), Middle Platonist philosopher

It may also refer to:

• 11428 Alcinoös, Jovian asteroid
• Alcinous, a genus of sea spider and original taxonym of the Aaaaba beetle

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