Halcyon
- Alcione (disambiguation)
- Alcyone (disambiguation)
- Alcyone and Ceyx
- Andy Moor (producer)
- Chrysler Halcyon
- Common Dreads
- Cypher (...And Oceans album)
- Dedicated (ATB album)
- Elinor Glyn
- Eternal Blue (album)
- Eternal Return (Windhand album)
- Glass Towers
- Greyview
- Halcyon (Best Of)
- Halcyon (Chicane song)
- Halcyon (Delphic song)
- Halcyon (Forsyth County, Georgia)
- Halcyon (Orbital song)
- Halcyon (Stargate Atlantis novel)
- Halcyon (TV series)
- Halcyon (album)
- Halcyon (book)
- Halcyon (console)
- Halcyon (dialogue)
- Halcyon (genus)
- Halcyon (role-playing game)
- Halcyon 23
- Halcyon Castle
- Halcyon Days (disambiguation)
- Halcyon Gallery
- Halcyon House
- Halcyon Monitoring Solutions
- Halcyon RB80
- Halcyon class minesweeper
- Halcyon, California
- Halcyon, Missouri
- Halcyon, West Virginia
- Halcyone Barnes
- Herbert James Draper
- Hermeus
- John Styn
- Kingfishr
- List of Image Comics publications
- Marian McPartland
- Noisia discography
- Solstice (UK doom metal band)
- The Halcyon
- The Halcyon Company
- The Outer Worlds
- Varian Medical Systems
- Walking Cloud and Deep Red Sky, Flag Fluttered and the Sun Shined