| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Punta del Monte, Gualeguay | E2840 XAS |
| Postal/ZIP Codes in Rincon del Nogoya Sur, Gualeguay | E2840 XAF |
| Postal/ZIP Codes in Saladero Alzua, Gualeguay | E2840 XAU |
| Postal/ZIP Codes in Saladero San José, Gualeguay | E2840 XBA |
| Postal/ZIP Codes in Santa Marta, Gualeguay | E2840 XBC |
| Postal/ZIP Codes in Septimo Distrito, Gualeguay | E2840 XAB |
| Postal/ZIP Codes in Sexto Distrito, Gualeguay | E3155 XAA |
| Postal/ZIP Codes in Tres Bocas, Gualeguay | E3155 XAD |