| Locality | Post Code |
|---|---|
| Los Molinos, Caseros | S2181 |
| Los Nogales, Caseros | S2184 |
| Los Quirquinchos, Caseros | S2637 |
| Pueblo Arequito, Caseros | S2183 |
| San José de la Esquina, Caseros | S2185 |
| Sanford, Caseros | S2174 |
| Santa Natalia, Caseros | S2639 XAJ |
| Villada, Caseros | S2176 |