Citadel (disambiguation)
- Armored citadel
- Citadel (1957 book)
- Citadel (2011 novel)
- Citadel (Half-Life)
- Citadel (Ne Obliviscaris album)
- Citadel (Starcastle album)
- Citadel (TV series)
- Citadel (comics)
- Citadel (film)
- Citadel (malware)
- Citadel (software)
- Citadel (song)
- Citadel (video game)
- Citadel Broadcasting
- Citadel Films
- Citadel Hill (Fort George)
- Citadel Island
- Citadel LLC
- Citadel Miniatures
- Citadel Outlets
- Citadel Press
- Citadel Records
- Citadel Securities
- Citadel Theatre
- Citadel of Aleppo
- Citadel of Erbil
- Citadel, Calgary
- Citadel/UX
- Citadelle (disambiguation)
- Citadels (card game)
- Citadels (video game)
- Cittadella (disambiguation)
- Halifax Citadels
- Muslimgauze
- Oldtown (A Song of Ice and Fire)
- Operation Citadel
- Royal Citadel (disambiguation)
- Salvation Army citadel
- The Citadel (disambiguation)