Eidolon may refer to:

• Eidolon (astral double), a Greek concept of a shade or astral double of a living being
• The Eidolon, a computer game from the 1980s by Lucasfilm Games
• Eidolon Software, a software company that caters to NextStep and Mac OS X clients
• Eidolon (band), a thrash, progressive, and power metal band
• Eidolon (album), an album by black metal band Dark Fortress.
• "Eidolon" a misspelling of the Eidelon (Farscape), an alien species in Farscape
• Eidolon a character in the Star Wars fan film Reign of the Fallen.

Eidolon may also be used for:

• Simulacrum
• Eidolon (Serpent Rider), one of the Serpent Riders in the Heretic-Hexen computer games
• Eidolon (Final Fantasy), The name given to summonable creatures in Final Fantasy IV and Final Fantasy IX, known in other titles variously as Summons, Espers, Aeons and Guardian Forces.
• Eidolon is a spirit creature type from the Magic: The Gathering trading card game (Dissension Expansion of the Ravnica Block).
• Eidolon a fantasy floating city in the Shadow World role-playing game campaign setting
• Kaer Eidolon a fantasy fort at the confluence of the Mothingale and Serpent Rivers in the role-playing game Earthdawn (described in the source book Nations of Barsaive, Volume One)

See also

• Eidolons
• Idolon specus
• Idolon tribus