| Locality | Postal Code |
|---|---|
| Antonio Catalano, General Roca | X6271 XAC |
| Burmeister, General Roca | X6225 XAA |
| Campo San Juan, General Roca | X6271 XAB |
| Colonia Boero, General Roca | X6270 XAC |
| Colonia Dorotea, General Roca | X6270 XAD |
| Costa del Rio Quinto, General Roca | X6271 XAD |
| De la Serna, General Roca | X6271 XAE |
| Del Campillo, General Roca | X6271 |
| El Árbol, General Roca | X6127 XAC |
| El Noy, General Roca | X6127 XAD |
| El Pampero, General Roca | X6273 XAB |
| Hipólito Bouchard, General Roca | X6225 |
| Huinca Renancó, General Roca | X6270 |
| Italó, General Roca | X6276 |
| Jovita, General Roca | X6127 |
| La Luz, General Roca | X6271 XAA |
| La Nacional, General Roca | X6275 XAC |
| La Penca, General Roca | X6279 XAA |
| La Perlita, General Roca | X6271 XAF |
| Larsen, General Roca | X6275 XAD |
| Lecueder, General Roca | X6273 XAD |
| Los Alfalfares, General Roca | X6275 XAA |
| Los Gauchos de Guemes, General Roca | X6127 XAA |
| Mattaldi, General Roca | X6272 |
| Melideo, General Roca | X6270 XAA |
| Modestino Pizarro, General Roca | X6273 XAA |