| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in João Arregui, Uruguaiana | 97530-000 |
| Postal/ZIP Codes in Plano Alto, Uruguaiana | 97515-000 |
| Postal/ZIP Codes in São Marcos, Uruguaiana | 97535-000 |
| Postal/ZIP Codes in Uruguaiana, Uruguaiana | 97501, 97502, 97503, 97504, 97507, 97508, 97509, 97511, 97513, 97514 |
| Postal/ZIP Codes in Vertentes, Uruguaiana | 97520-000 |