Philippine Standard Time:
| 10 Digit Code: | 0203100000 |
| Correspondence Code: | 023100000 |
| Info | Income Class | Population (2020 Census) |
|---|---|---|
| 34 Mun., 3 Cities and 1055 Bgys | 1st | 1697050 |
| Cities in the Province of Isabela |
| There are 3 cities as of 31 March 2024 |
| City | 10 Digit Code | Correspondence Code | Income Class | Population(2020 Census) |
|---|---|---|---|---|
| City of Cauayan | 0203108000 | 023108000 | 3rd | 143403 |
| City of Ilagan | 0203114000 | 023114000 | 1st (as Mun) | 158218 |
| City of Santiago | 0203135000 | 023135000 | 1st | 148580 |
| Municipalities in the province of Isabela |
| There are 34 municipalities as of 31 March 2024 |
| Municipality | 10 Digit Code | Correspondence Code | Income Class | Population(2020 Census) |
|---|---|---|---|---|
| Alicia | 0203101000 | 023101000 | 1st | 73874 |
| Angadanan | 0203102000 | 023102000 | 3rd | 44977 |
| Aurora | 0203103000 | 023103000 | 3rd | 36621 |
| Benito Soliven | 0203104000 | 023104000 | 4th | 29752 |
| Burgos | 0203105000 | 023105000 | 4th | 26040 |
| Cabagan | 0203106000 | 023106000 | 1st | 53897 |
| Cabatuan | 0203107000 | 023107000 | 3rd | 39990 |
| Cordon | 0203109000 | 023109000 | 3rd | 46477 |
| Dinapigue | 0203110000 | 023110000 | 1st | 5821 |
| Divilacan | 0203111000 | 023111000 | 2nd | 5827 |
| Echague | 0203112000 | 023112000 | 1st | 88410 |
| Gamu | 0203113000 | 023113000 | 4th | 30655 |
| Jones | 0203115000 | 023115000 | 1st | 45628 |
| Luna | 0203116000 | 023116000 | 5th | 20697 |
| Maconacon | 0203117000 | 023117000 | 3rd | 3977 |
| Delfin Albano | 0203118000 | 023118000 | 4th | 29928 |
| Mallig | 0203119000 | 023119000 | 4th | 32208 |
| Naguilian | 0203120000 | 023120000 | 4th | 33788 |
| Palanan | 0203121000 | 023121000 | 1st | 17684 |
| Quezon | 0203122000 | 023122000 | 4th | 27037 |
| Quirino | 0203123000 | 023123000 | 4th | 25023 |
| Ramon | 0203124000 | 023124000 | 2nd | 56523 |
| Reina Mercedes | 0203125000 | 023125000 | 4th | 27900 |
| Roxas | 0203126000 | 023126000 | 1st | 65839 |
| San Agustin | 0203127000 | 023127000 | 3rd | 22096 |
| San Guillermo | 0203128000 | 023128000 | 4th | 20915 |
| San Isidro | 0203129000 | 023129000 | 5th | 27044 |
| San Manuel | 0203130000 | 023130000 | 4th | 34085 |
| San Mariano | 0203131000 | 023131000 | 1st | 60124 |
| San Mateo | 0203132000 | 023132000 | 1st | 66663 |
| San Pablo | 0203133000 | 023133000 | 2nd | 26320 |
| Santa Maria | 0203134000 | 023134000 | 4th | 25758 |
| Santo Tomas | 0203136000 | 023136000 | 4th | 24528 |
| Tumauini | 0203137000 | 023137000 | 1st | 70743 |
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Other Classification Systems
- 2017 Philippine Standard Classification of Education (PSCED)
- 2002 Philippine Central Product Classification (PCPC)
- Philippine Standard Geographic Code (PSGC)
- 2019 Updates to the 2009 Philippine Standard Industrial Classification (PSIC)
- 2012 Philippine Standard Occupational Classification (PSOC)
- 2018 Philippine Standard Classification of Crime for Statistical Purposes (PSCCS)