Caja can refer to:
- Caja or caixa, a Spanish savings bank similar to a credit union
- Caja (programming language), an object-capability programming language that is a subset of JavaScript
- Caja del Rio, a mesa in New Mexico, USA
- Caja vallenata, a drum similar to a tambora
- Caja China, see Nochebuena
- Caja, a file manager of the MATE desktop environment