Lok may refer to:
- LOK (Hellenic Army), Mountain Raider Companies (1946-1975) of the Greek Army
- Lok (Star Wars), a fictional planet in the Star Wars universe
- Legends of Kesmai (LOK), an online role-playing game
- Legend of Korra, an American television series and the sequel to Avatar:The Last Airbender
- Lok, the protagonist of William Golding's novel The Inheritors
- Lok, a fictional character in the video game Tak and the Power of Juju and its sequels and film adaptation
- Places
- Lok (Titel), Serbia, a village
- Lok, Levice District, Slovakia, a village
- Lok, Pakistan, a village