Reptilian may refer to:
- Reptiles and their qualities
- Reptilians, malevolent reptilian humanoids featured in conspiracy theories and alien abduction accounts
- List of reptilian humanoids, reptilian humanoids in fiction and mythology generally
- Reptilian (film), the American title for the 1999 South Korean kaiju film remake of Yonggary (1967)
- Reptilian (album), album by the Norwegian extreme metal group Keep of Kalessin
- "Reptilia", music single by The Strokes
- Reptilian complex (brain theory)
- Reptilians, album by the American electronica band Starfucker
- "Reptile's Theme", music single by the American producer Skrillex