Caju may refer to:
- Caju, a river of Roraima state in northern Brazil
- Caju, a lower-class district of the Zona Norte (North Zone) of Rio de Janeiro
- Caju, the Portuguese name for the fruit of the Cashew tree
- Caju Cemetery, a necropolis in Rio de Janeiro
Wanderson de Jesus Martins, commonly known as Caju (born 17 July 1995), is a Brazilian footballer who plays for Santos as an left back.