Castiel may refer to:
- Castiel (Supernatural), a character in the television series Supernatural
- Castiel, Switzerland, a former municipality
- Castiel, a Hebrew name meaning "my cover is God" or "shield of God" in theophory in the Bible
See also
- Cassiel, an angel appearing in extracanonical Jewish, Christian, and Islamic mystical and magical works
- Castile (disambiguation)
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