Reena may refer to:
- Reena (given name), including a list of people with the name
- Reena (actress), Indian film actress in Malayalam films
- Reena Virk, Indian-Canadian murder victim
- Reena Malhotra, character in the 2001 Indian film Rehnaa Hai Terre Dil Mein, played by Dia Mirza
- Reena Desai, a character in the Indian KGF (film series)
- Camps Mohican Reena, sleepaway camps in Massachusetts