Jaina can refer to:
- Jain/Jaina, a follower of Jainism, an ancient classical religion of India
- List of Jains, a list of various notable Jains
- Jain Associations in North America (JAINA)
- Jaina Island, an archaeological site of the Maya civilization, in the present-day Mexican state of Campeche
- Jaina Solo, a fictional Star Wars Expanded Universe character
- Jaina Proudmoore, a fictional character in Warcraft III and World of Warcraft