| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Alto Acacitas, Guamal | 507057 |
| Postal/ZIP Codes in Cabecera Municipal, Guamal | 507051 |
| Postal/ZIP Codes in El Carmen, Guamal | 507051 |
| Postal/ZIP Codes in El Recreo, Guamal | 507057 |
| Postal/ZIP Codes in Guamal, Guamal | 507058 |
| Postal/ZIP Codes in La Isla, Guamal | 507051 |
| Postal/ZIP Codes in La Paz, Guamal | 507057 |
| Postal/ZIP Codes in Pío Xii, Guamal | 507051 |
| Postal/ZIP Codes in San Cristóbal, Guamal | 507057 |