Philippine Standard Time:
| 10 Digit Code: | 0102900000 |
| Correspondence Code: | 012900000 |
| Info | Income Class | Population (2020 Census) |
|---|---|---|
| 32 Mun., 2 Cities and 768 Bgys | 1st | 706009 |
| Cities in the Province of Ilocos Sur |
| There are 2 cities as of 31 March 2024 |
| City | 10 Digit Code | Correspondence Code | Income Class | Population(2020 Census) |
|---|---|---|---|---|
| City of Candon | 0102906000 | 012906000 | 4th | 61432 |
| City of Vigan | 0102934000 | 012934000 | 4th | 53935 |
| Municipalities in the province of Ilocos Sur |
| There are 32 municipalities as of 31 March 2024 |
| Municipality | 10 Digit Code | Correspondence Code | Income Class | Population(2020 Census) |
|---|---|---|---|---|
| Alilem | 0102901000 | 012901000 | 4th | 7361 |
| Banayoyo | 0102902000 | 012902000 | 4th | 7931 |
| Bantay | 0102903000 | 012903000 | 3rd | 37118 |
| Burgos | 0102904000 | 012904000 | 4th | 12793 |
| Cabugao | 0102905000 | 012905000 | 1st | 38884 |
| Caoayan | 0102907000 | 012907000 | 4th | 19574 |
| Cervantes | 0102908000 | 012908000 | 4th | 19449 |
| Galimuyod | 0102909000 | 012909000 | 4th | 10244 |
| Gregorio del Pilar | 0102910000 | 012910000 | 5th | 4472 |
| Lidlidda | 0102911000 | 012911000 | 5th | 4705 |
| Magsingal | 0102912000 | 012912000 | 3rd | 31308 |
| Nagbukel | 0102913000 | 012913000 | 5th | 5465 |
| Narvacan | 0102914000 | 012914000 | 2nd | 46234 |
| Quirino | 0102915000 | 012915000 | 4th | 9306 |
| Salcedo | 0102916000 | 012916000 | 4th | 11110 |
| San Emilio | 0102917000 | 012917000 | 4th | 7206 |
| San Esteban | 0102918000 | 012918000 | 5th | 8381 |
| San Ildefonso | 0102919000 | 012919000 | 5th | 8190 |
| San Juan | 0102920000 | 012920000 | 3rd | 26674 |
| San Vicente | 0102921000 | 012921000 | 5th | 13118 |
| Santa | 0102922000 | 012922000 | 4th | 14992 |
| Santa Catalina | 0102923000 | 012923000 | 5th | 14493 |
| Santa Cruz | 0102924000 | 012924000 | 1st | 41366 |
| Santa Lucia | 0102925000 | 012925000 | 3rd | 25966 |
| Santa Maria | 0102926000 | 012926000 | 3rd | 30006 |
| Santiago | 0102927000 | 012927000 | 4th | 19471 |
| Santo Domingo | 0102928000 | 012928000 | 3rd | 29041 |
| Sigay | 0102929000 | 012929000 | 5th | 2552 |
| Sinait | 0102930000 | 012930000 | 3rd | 25998 |
| Sugpon | 0102931000 | 012931000 | 5th | 4930 |
| Suyo | 0102932000 | 012932000 | 4th | 10766 |
| Tagudin | 0102933000 | 012933000 | 2nd | 41538 |
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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)