Eidolon may refer to:
- Eidolon (apparition), a spirit-image of a living or dead person in ancient Greek thought
In Business:
- Eidolon Publications, a small press publisher based in North Perth, Western Australia
- Eidolon (magazine), a speculative fiction magazine published by Eidolon Publications
- Eidolon Books, the book publishing arm of Eidolon Publications
- Eidolon Software, a software company that caters to NextStep and Mac OS X clients
In music:
- Eidolons (band), an alternative band based in Portland, OR
- Eidolon (band), a heavy metal band
- Eidolon (album), an album by black metal band Dark Fortress
In video games:
- The Eidolon, a computer game from the 1980s by Lucasfilm Games
- Summoned monsters in Final Fantasy IX, Final Fantasy XIII, Final Fantasy Type-0 and the DS version of Final Fantasy IV are called Eidolons.
In film and television:
- Eidolon (Farscape), an alien race in the TV miniseries Farscape: The Peacekeeper Wars
Other:
- Eidolon (genus), a genus of bat