Yaga may refer to:
- Yajna, a Vedic fire ritual
- Yaga Gathering, a music festival in Lithuania
- Baba Yaga, a supernatural, witch-like being in Slavic mythology
- Baba Yaga (Dungeons & Dragons), a creature in the fantasy roleplaying game Dungeons & Dragons; patterned on the character from Slavic myth
- Geraldine Yaga Grimm, a character in the animated show Mysticons
- A race of cruel, black-skinned, winged humanoids from Robert E. Howard's 1939 planetary romance novel, Almuric.