| Caju | |
| Settlement Type: | Neighborhood |
| Pushpin Map: | Brazil Rio de Janeiro#Brazil |
| Pushpin Map Caption: | Location in Rio de Janeiro |
| Subdivision Type: | Country |
| Subdivision Name: |  Brazil |
| Subdivision Type1: | State |
| Subdivision Name1: | Rio de Janeiro (RJ) |
| Subdivision Type2: | Municipality/City |
| Subdivision Name2: | Rio de Janeiro |
| Subdivision Type3: | Zone |
| Subdivision Name3: | Centro |
| Population As Of: | 2010 |
| Population Total: | 20,477 [1] |
| Coordinates: | -22.88°N -43.2206°W |
Caju is a working-class district of the North Zone of Rio de Janeiro, Brazil. Prior to the current region Caju belonged to the historic district of São Cristóvão.