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