Sub-Zero may refer to:
- Bi-Han, the elder and original Sub-Zero who was killed by Scorpion in the original Mortal Kombat Tournament. Bi-Han was soon resurrected by Quan Chi as Noob Saibot, a wraith who is the very incarnation of evil.
- Kuai Liang, the younger brother of Bi-Han, whose original codename was Tundra, until he abandoned the name to honour his brother.
- Jin Liang, the next-generation Sub-Zero and son of Kuai Liang and Sareena, also the nephew of Bi-Han. Jin was trained by his father to hone his cryomancer powers and suppress his inner demons.
- Justin Thomas, Justin Thomas is Sub-Zero IV, but he is usally referred to BanIcE. He is american and has some similaraties to Johnny Cage. He has a close relationship with Kuai Liang and Bi-Han. They trained Thomas to be a cryomancer like them and to be the next bext thing.