| Locality | Post Code |
|---|---|
| Agustín Roca, Junín | B6026 |
| Agustina, Junín | B6023 |
| Barrio Carosio, Junín | B6000 XAA |
| Barrio Villa Ortega, Junín | B6000 XAC |
| Blandengues, Junín | B6032 XAA |
| Campo Maipú, Junín | B6013 XAB |
| Fortín Tiburcio, Junín | B6024 |
| Junín, Junín | B6000, B6002 |
| La Oriental, Junín | B6022 XAC |
| Laguna de Gómez, Junín | B6001 XAA |
| Laplacette, Junín | B6013 XAA |
| Las Parvas, Junín | B6022 XAA |
| Morse, Junín | B6049 |
| Pueblo Nuevo, Junín | B6000 XAK |
| Saforcada, Junín | B6022 XAB |
| Villa Belgrano, Junín | B6000 XAD |
| Villa Mayor, Junín | B6000 XAE |
| Villa Ortega, Junín | B6000 XAF |
| Villa Penotti, Junín | B6000 XAG |
| Villa Talleres, Junín | B6000 XAH |
| Villa Triangulo, Junín | B6000 XAI |
| Villa York, Junín | B6000 XAJ |