The following are the zip codes in the municipalities and cities of Isabela.

RegionProvincesCity/MunicipalityZip Code
Region 2 (Cagayan Valley)IsabelaSan Guillermo3308
Region 2 (Cagayan Valley)IsabelaSan Isidro3310
Region 2 (Cagayan Valley)IsabelaSan Manuel3317
Region 2 (Cagayan Valley)IsabelaSan Mariano3332
Region 2 (Cagayan Valley)IsabelaSan Mateo3318
Region 2 (Cagayan Valley)IsabelaSan Pablo3329
Region 2 (Cagayan Valley)IsabelaSta. Maria3330
Region 2 (Cagayan Valley)IsabelaSantiago CIty3311
Region 2 (Cagayan Valley)IsabelaSto. Tomas3327
Region 2 (Cagayan Valley)IsabelaTumauini3325
Region 2 (Cagayan Valley)IsabelaQuirino3321
Region 2 (Cagayan Valley)IsabelaRamon3319
Region 2 (Cagayan Valley)IsabelaReina Mercedes3303
Region 2 (Cagayan Valley)IsabelaRoxas3320
Region 2 (Cagayan Valley)IsabelaSan Agustin3314
Region 2 (Cagayan Valley)IsabelaGamu3301
Region 2 (Cagayan Valley)IsabelaJones3313
Region 2 (Cagayan Valley)IsabelaLuna3304
Region 2 (Cagayan Valley)IsabelaMaconacon3333
Region 2 (Cagayan Valley)IsabelaMallig3323
Region 2 (Cagayan Valley)IsabelaNaguillan3302
Region 2 (Cagayan Valley)IsabelaPalanan3334
Region 2 (Cagayan Valley)IsabelaQuezon3324
Region 2 (Cagayan Valley)IsabelaCordon3312
Region 2 (Cagayan Valley)IsabelaDelfin Albano3326
Region 2 (Cagayan Valley)IsabelaDinapigue3336
Region 2 (Cagayan Valley)IsabelaDivilacan3335
Region 2 (Cagayan Valley)IsabelaEchague3309
Region 2 (Cagayan Valley)IsabelaCity of Ilagan3300
Region 2 (Cagayan Valley)IsabelaAlicia3306
Region 2 (Cagayan Valley)IsabelaAngadanan3307
Region 2 (Cagayan Valley)IsabelaAurora3316
Region 2 (Cagayan Valley)IsabelaBenito Soliven3331
Region 2 (Cagayan Valley)IsabelaBurgos3322
Region 2 (Cagayan Valley)IsabelaCabagan3328
Region 2 (Cagayan Valley)IsabelaCabatuan3315
Region 2 (Cagayan Valley)IsabelaCity of Cauayan3305