| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Colonia Juliá y Echarren, Pichi Mahuida | R8139 |
| Postal/ZIP Codes in Coronel Eugenio del Busto, Pichi Mahuida | R8138 XAC |
| Postal/ZIP Codes in Juan de Garay, Pichi Mahuida | R8134 XAE |
| Postal/ZIP Codes in La Adela, Pichi Mahuida | R8138 XAA |
| Postal/ZIP Codes in La Maria Ines, Pichi Mahuida | R8138 XAD |
| Postal/ZIP Codes in Pichi Mahuida, Pichi Mahuida | R8138 XAE |
| Postal/ZIP Codes in Río Colorado, Pichi Mahuida | R8138, R8140 |
| Postal/ZIP Codes in San León, Pichi Mahuida | R8138 XAB |