Look up cyren in Wiktionary, the free dictionary.
Cyren may refer to:
- Cyren (surname)
- Cyren Burdick (1800–1837), American politician in Michigan
- Cyren (Ninjago), a character in Ninjago
- Cyren, a 1980s American band featuring Jani Lane
- CYREN, a defunct Internet security company
- CYREN (protein)