The following are the zip codes in the municipalities and cities of Iloilo.
| Region | Provinces | City/Municipality | Zip Code |
| Region 6 (Western Visayas) | Iloilo | Ajuy | 5012 |
| Region 6 (Western Visayas) | Iloilo | Alimodian | 5028 |
| Region 6 (Western Visayas) | Iloilo | Anilao | 5009 |
| Region 6 (Western Visayas) | Iloilo | Badiangan | 5033 |
| Region 6 (Western Visayas) | Iloilo | Balasan | 5018 |
| Region 6 (Western Visayas) | Iloilo | Banate | 5010 |
| Region 6 (Western Visayas) | Iloilo | Barotac Nuevo | 5007 |
| Region 6 (Western Visayas) | Iloilo | Barotac Viejo | 5011 |
| Region 6 (Western Visayas) | Iloilo | Batad | 5016 |
| Region 6 (Western Visayas) | Iloilo | Bingawan | 5041 |
| Region 6 (Western Visayas) | Iloilo | Cabatuan | 5031 |
| Region 6 (Western Visayas) | Iloilo | Calinog | 5040 |
| Region 6 (Western Visayas) | Iloilo | Carles | 5019 |
| Region 6 (Western Visayas) | Iloilo | Conception | 5013 |
| Region 6 (Western Visayas) | Iloilo | Dingle | 5035 |
| Region 6 (Western Visayas) | Iloilo | Dueñas | 5038 |
| Region 6 (Western Visayas) | Iloilo | Dumangas | 5006 |
| Region 6 (Western Visayas) | Iloilo | Estancia | 5017 |
| Region 6 (Western Visayas) | Iloilo | Guimbal | 5022 |
| Region 6 (Western Visayas) | Iloilo | Igbaras | 5029 |
| Region 6 (Western Visayas) | Iloilo | Iloilo City | 5000 |
| Region 6 (Western Visayas) | Iloilo | Janiuay | 5034 |
| Region 6 (Western Visayas) | Iloilo | Lambunao | 5042 |
| Region 6 (Western Visayas) | Iloilo | Leganes | 5003 |
| Region 6 (Western Visayas) | Iloilo | Lemery | 5043 |
| Region 6 (Western Visayas) | Iloilo | Leon | 5026 |
| Region 6 (Western Visayas) | Iloilo | Maasin | 5030 |
| Region 6 (Western Visayas) | Iloilo | Miagao | 5023 |
| Region 6 (Western Visayas) | Iloilo | Mina | 5032 |
| Region 6 (Western Visayas) | Iloilo | New Lucena | 5005 |
| Region 6 (Western Visayas) | Iloilo | Oton | 5020 |
| Region 6 (Western Visayas) | Iloilo | Passi | 5037 |
| Region 6 (Western Visayas) | Iloilo | Pavia | 5001 |
| Region 6 (Western Visayas) | Iloilo | Pototan | 5008 |
| Region 6 (Western Visayas) | Iloilo | San Dionisio | 5015 |
| Region 6 (Western Visayas) | Iloilo | San Enrique | 5036 |
| Region 6 (Western Visayas) | Iloilo | San Joaquin | 5024 |
| Region 6 (Western Visayas) | Iloilo | San Miguel | 5025 |
| Region 6 (Western Visayas) | Iloilo | San Rafael | 5039 |
| Region 6 (Western Visayas) | Iloilo | Santa Barbara | 5002 |
| Region 6 (Western Visayas) | Iloilo | Sara | 5014 |
| Region 6 (Western Visayas) | Iloilo | Tigbauan | 5021 |
| Region 6 (Western Visayas) | Iloilo | Tubungan | 5027 |
| Region 6 (Western Visayas) | Iloilo | Zarraga | 5004 |
