| Postal Code | Postal Code Place Name | Province | Canton |
|---|---|---|---|
| 30101 | Oriental | Cartago | Cartago |
| 30102 | Occidental | Cartago | Cartago |
| 30103 | Carmen | Cartago | Cartago |
| 30104 | San Nicolás | Cartago | Cartago |
| 30105 | Aguacaliente o San Francisco | Cartago | Cartago |
| 30106 | Guadalupe o Arenilla | Cartago | Cartago |
| 30107 | Corralillo | Cartago | Cartago |
| 30108 | Tierra Blanca | Cartago | Cartago |
| 30109 | Dulce Nombre | Cartago | Cartago |
| 30110 | Llano Grande | Cartago | Cartago |
| 30111 | Quebradilla | Cartago | Cartago |