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Province

Ilocos Sur

Ilocos Sur is a province in the Ilocos Region of Luzon, Philippines. Its population was 709,991 in the 2024 census, and it has 2 cities and 32 municipalities.

  • Population: 2024 Census
  • Places: PSGC 2Q 2026
  • Checked by Scene: October 8, 2026
  • Page updated: October 8, 2026
An empty cobblestone street between old two-storey stone houses with wooden balconies and capiz windows, cart wheels by the doors, in soft morning light.
Calle Crisologo, in Vigan.Photo: “Old Road” by Ignacio Malapitan III, CC BY-SA 3.0, via Wikimedia Commons; resized by Scene. Scene's copy is shared under the same licence.

  • PeopleSources

    709,991

    people counted in the 2024 censusCensusA count of every person in the country, all on one day. The 2024 census counted people as they were on 1 July 2024.More in the glossary

    Up 7.8% from 2010 to 2024

  • Rank by peopleSources

    3rd

    of the 4 provinces of Ilocos Region by population, 2024Rank and shareWorked out by Scene from the PSA's counts: where a place stands among the places listed with it, and how many of every 100 of its parent's people live in it.More in the glossary

    About 13 of every 100 people in Ilocos Region lived in Ilocos Sur in 2024 (13.29%)

  • Inside itSources

    34

    cities and municipalities

    768 barangays

  • LandSources

    2,651.49 km²

    of land, 2019 masterlistLand areaThe land inside the place's official boundary. A square kilometre is a square 1 km on each side, about the size of 140 football fields.Explained by Scene: Ilocos Sur's land would fill a square about 51.5 km on each side. That is only a way to picture its size: its real shape is on the map.More in the glossary

    Average density, 2024: 268 people per km²Population densityHow crowded a place is on average: its people divided by its land area. 1,000 people per square kilometre is 10 people per hectare, a square of 100 by 100 metres.Explained by Scene: About 3 people per hectare if everyone were spread evenly across the land. In fact people live closer together in towns and farther apart in the countryside.More in the glossary

  • HomesSources

    186,223

    households in 2024HouseholdA person living alone, or people who sleep in the same home and share their meals. A family may be one household or several.More in the glossary

    3.8 people in each, on average, in 2024

  • Town or countrySources

    10.6%

    About 11 of every 100 people lived in urban barangays in 2024Urban barangayThe PSA counts a barangay as urban when it has 5,000 people or more, or a big employer, or several businesses and public services close by. Every barangay in Metro Manila is urban.More in the glossary

PSGC codePSGC codeThe code the Philippine Statistics Authority gives every place, so each one is known exactly, even when two share a name.More in the glossary
0102900000[4]Formerly 012900000

People

Ilocos Sur had 709,991 people in the 2024 census, up 7.8% from 2010.
People at each census since 1960

Counts from 2000 on are on today’s borders; earlier counts are as the place was then, so the line may step where a border moved.

Ilocos Sur had the 3rd most people of the 4 provinces of Ilocos Region in 2024[1]
  1. 1Pangasinan3,188,540
  2. 2La Union825,072
  3. 3Ilocos Sur709,991
  4. 4Ilocos Norte618,850
All 4 provinces of Ilocos Region
Of every 100 people in Ilocos Sur in 2024[1]
Age structure · 2024 Census[5]People living in households, by age and sex
  • About 22 of every 100 are children under 15 (21.7%)
  • About 68 of every 100 are of working age, 15 to 64 (68.1%)
  • About 10 of every 100 are 65 or older (10.1%)
MenWomen

The figures by age

People by age group, men and women
AgePeopleMenWomen
Under 541,24121,49519,746
5 - 951,62126,90724,714
10 - 1461,35832,03729,321
15 - 1965,79934,24231,557
20 - 2461,60031,96529,635
25 - 2954,45528,42126,034
30 - 3454,26628,32825,938
35 - 3948,78325,39323,390
40 - 4449,14725,52023,627
45 - 4942,97122,32320,648
50 - 5439,23020,33218,898
55 - 5935,19217,63817,554
60 - 6431,84415,58416,260
65 - 6925,03611,55813,478
70 - 7419,2548,17111,083
75 - 7911,9584,3697,589
80 - 848,1512,5025,649
85 and over7,3091,8975,412

Every figure, census by census

People, 2024 CensusCensusA count of every person in the country, all on one day. The 2024 census counted people as they were on 1 July 2024.More in the glossary
709,991[1, 2]
Households, 2024HouseholdA person living alone, or people who sleep in the same home and share their meals. A family may be one household or several.More in the glossary
186,223[1, 2]
People in each household, 2024
3.8 on average[1, 2]
Share of Ilocos Region, 2024Rank and shareWorked out by Scene from the PSA's counts: where a place stands among the places listed with it, and how many of every 100 of its parent's people live in it.More in the glossary
13.29%[1]
In urban barangays, 2024Urban barangayThe PSA counts a barangay as urban when it has 5,000 people or more, or a big employer, or several businesses and public services close by. Every barangay in Metro Manila is urban.More in the glossary
10.6% (75,287 people)[6]
Men and women, 2024
358,682 men, 350,533 women[5]People living in households
Population at each census, with its source
CensusPopulationGrowth since the census beforeHouseholdsPeople per household
2024as of July 1, 2024709,991[1, 2]0.13% a year186,2233.8
2020as of May 1, 2020706,009[1]0.49% a year——
2015as of August 1, 2015689,668[1]0.88% a year——
2010as of May 1, 2010658,587[1]———
2007as of August 1, 2007; as it was then633,138[39]0.88% a year——
2000as of May 1, 2000; on today’s borders594,206[39, 40]1.85% a year——
1995as of September 1, 1995; as it was then545,385[39]0.90% a year——
1990as of May 1, 1990; as it was then519,966[39]1.60% a year——
1980as of May 1, 1980; as it was then443,591[39]1.11% a year——
1975as of May 1, 1975; as it was then419,776[39]1.74% a year——
1970as of May 6, 1970; as it was then385,139[39]1.28% a year——
1960as of February 15, 1960; as it was then338,058[39]———

Cities and municipalities

Ilocos Sur is made up of 32 municipalities and 2 cities, with 768 barangays in all.
Colour byColours the map of Ilocos Sur by the figure chosen; the key beside it says what each colour means.
AbraBenguetIlocos NorteLa UnionMountain ProvinceAlilem: 7,736 people, 93 per km², 1.20% a yearBanayoyo: 7,953 people, 332 per km², 0.07% a yearBantay: 37,088 people, 518 per km², −0.02% a yearBurgos: 13,026 people, 265 per km², 0.43% a yearCabugao: 38,981 people, 422 per km², 0.06% a yearCaoayan: 19,715 people, 1,062 per km², 0.17% a yearCervantes: 20,065 people, 52 per km², 0.75% a yearCandon City: 61,315 people, 795 per km², −0.05% a yearVigan City: 54,498 people, 2,275 per km², 0.25% a yearGalimuyod: 10,263 people, 335 per km², 0.04% a yearGregorio del Pilar: 4,385 people, 113 per km², −0.47% a yearLidlidda: 4,846 people, 158 per km², 0.71% a yearMagsingal: 31,970 people, 366 per km², 0.50% a yearNagbukel: 5,370 people, 119 per km², −0.42% a yearNarvacan: 46,265 people, 373 per km², 0.02% a yearQuirino: 9,460 people, 35 per km², 0.39% a yearSalcedo: 11,196 people, 110 per km², 0.19% a yearSan Emilio: 7,513 people, 31 per km², 1.01% a yearSan Esteban: 8,621 people, 433 per km², 0.68% a yearSan Ildefonso: 8,213 people, 778 per km², 0.07% a yearSan Juan: 26,709 people, 356 per km², 0.03% a yearSan Vicente: 13,074 people, 987 per km², −0.08% a yearSanta: 15,164 people, 239 per km², 0.27% a yearSanta Catalina: 14,319 people, 1,530 per km², −0.29% a yearSanta Cruz: 41,296 people, 461 per km², −0.04% a yearSanta Lucia: 26,200 people, 580 per km², 0.22% a yearSanta Maria: 30,076 people, 476 per km², 0.06% a yearSantiago: 19,771 people, 404 per km², 0.37% a yearSanto Domingo: 29,372 people, 554 per km², 0.27% a yearSigay: 2,577 people, 35 per km², 0.23% a yearSinait: 26,059 people, 341 per km², 0.06% a yearSugpon: 4,238 people, 187 per km², −3.56% a yearSuyo: 11,051 people, 79 per km², 0.63% a yearTagudin: 41,606 people, 854 per km², 0.04% a year

People · 2024 Census

  • Under 20,000
  • 20,000 to 31,000
  • 31,000 to 45,000
  • 45,000 to 76,000
  • 76,000 and over

The same steps colour every map of cities and municipalities in the Atlas, so a colour means the same range everywhere.

Density · people per km², 2024

  • Under 140
  • 140 to 250
  • 250 to 390
  • 390 to 750
  • 750 and over

The same steps colour every map of cities and municipalities in the Atlas, so a colour means the same range everywhere.

Growth a year · 2020–2024

  • Fell by more than 1% a year
  • Fell, by up to 1% a year
  • Grew, by under 1% a year
  • Grew by 1 to 2% a year
  • Grew by 2% a year or more

Each place's yearly change between the 2020 and 2024 censuses, on the same steps as every map in the Atlas.

Borders from UN OCHA (PSA and NAMRIA), a guide and not the legal boundary[3]Open in OpenStreetMap
Cities and municipalities of Ilocos Sur. Each column heading sorts the table.
Kind[1, 7]Share (2024)
AlilemMunicipality7,7361.09%1.20% a year83.46 km²
BanayoyoMunicipality7,9531.12%0.07% a year23.98 km²
BantayMunicipality37,0885.22%−0.02% a year71.63 km²
BurgosMunicipality13,0261.83%0.43% a year49.11 km²
CabugaoMunicipality38,9815.49%0.06% a year92.34 km²
CaoayanMunicipality19,7152.78%0.17% a year18.56 km²
CervantesMunicipality20,0652.83%0.75% a year389.14 km²
Candon CityComponent city61,3158.64%−0.05% a year77.13 km²
Vigan CityComponent city54,4987.68%0.25% a year23.96 km²
GalimuyodMunicipality10,2631.45%0.04% a year30.66 km²
Gregorio del PilarMunicipality4,3850.62%−0.47% a year38.90 km²
LidliddaMunicipality4,8460.68%0.71% a year30.65 km²
MagsingalMunicipality31,9704.5%0.50% a year87.34 km²
NagbukelMunicipality5,3700.76%−0.42% a year45.29 km²
NarvacanMunicipality46,2656.52%0.02% a year123.97 km²
QuirinoMunicipality9,4601.33%0.39% a year266.70 km²
SalcedoMunicipality11,1961.58%0.19% a year101.55 km²
San EmilioMunicipality7,5131.06%1.01% a year244.44 km²
San EstebanMunicipality8,6211.21%0.68% a year19.92 km²
San IldefonsoMunicipality8,2131.16%0.07% a year10.56 km²
San JuanMunicipality26,7093.76%0.03% a year75.05 km²
San VicenteMunicipality13,0741.84%−0.08% a year13.25 km²
SantaMunicipality15,1642.14%0.27% a year63.51 km²
Santa CatalinaMunicipality14,3192.02%−0.29% a year9.36 km²
Santa CruzMunicipality41,2965.82%−0.04% a year89.64 km²
Santa LuciaMunicipality26,2003.69%0.22% a year45.15 km²
Santa MariaMunicipality30,0764.24%0.06% a year63.23 km²
SantiagoMunicipality19,7712.78%0.37% a year48.96 km²
Santo DomingoMunicipality29,3724.14%0.27% a year53.01 km²
SigayMunicipality2,5770.36%0.23% a year74.12 km²
SinaitMunicipality26,0593.67%0.06% a year76.43 km²
SugponMunicipality4,2380.6%−3.56% a year22.64 km²
SuyoMunicipality11,0511.56%0.63% a year139.14 km²
TagudinMunicipality41,6065.86%0.04% a year48.71 km²

Land & Environment

Ilocos Sur covers 2,651.49 km² of land, 268 people for every km² in 2024. Its land rises to 2,332 m above the sea and it has 163.6 km of coast.
Land areaLand areaThe land inside the place's official boundary. A square kilometre is a square 1 km on each side, about the size of 140 football fields.More in the glossary
2,651.49 km²[7]As listed in the 2019 Masterlist of Land Areas (LMB, DENR)
Average density, 2024Population densityHow crowded a place is on average: its people divided by its land area. 1,000 people per square kilometre is 10 people per hectare, a square of 100 by 100 metres.More in the glossary
268 people per km²[7]
Coordinates
17.04983° N, 120.60108° E[3]The point inside its border farthest from every edge, so it always falls within the place.
Height above the sea[36]
Lowest
Sea level
Average
339 m
Highest
2,332 m

Heights from the Copernicus DEM, a 30 m model of the surface: it reads the tops of trees and roofs, not the bare ground, over the land inside the border, the sea left out. Produced using Copernicus WorldDEM-30 © DLR e.V. 2010-2014 and © Airbus Defence and Space GmbH 2014-2018 provided under COPERNICUS by the European Union and ESA; all rights reserved.

Water, coast and peaks

163.6 km of coastline[37]

Rivers[37]

  1. Abra River60.5 of 194.8 km
  2. Santa Maria River39.1 of 39.3 km
  3. Amburayan River34.4 of 75.2 km
  4. Buaya River31.8 of 31.9 km
  5. Bucong River27.1 km
  6. Narvacan River19.7 km
  7. Bakun River19.1 of 31.7 km
  8. Namitpit River14.6 km

The longest inside it: 41 in all.

Peaks[37]

  1. Mount Namandiraan2,310 m
  2. Mount Namogoian2,009 m
  3. Mount Malaya2,000 m
  4. Mount Libo Libo1,785 m
  5. Mount Monserrat1,763 m
  6. Mount Tuwato1,692 m

The highest: 31 in all.

Named rivers, lakes and peaks as OpenStreetMap mapped them on 30 September 2026, and the coast within 150 m of the border. Map data © OpenStreetMap contributors, under the Open Database License.

Climate

Climate typeClimate typePAGASA sorts the country's climate into four types by when the rain falls. Type I has a dry season from November to April and a wet one for the rest of the year; Type II has no dry season, with the most rain from December to February; Type III has a short dry season; Type IV has rain spread through the year.More in the glossary

Type I[38]

Two seasons: dry from November to April, wet for the rest of the year, with the heaviest rain from June to September.

Read by Scene off PAGASA's climate map, so approximate: the type that covers most of the place's land.

Life & Economy

Ilocos Sur's economy made ₱131.4 billion of goods and services in 2025, ₱188,104 for each person. About 7 of every 100 people lived below the poverty line in 2023.
Economy, 2025Gross domestic productThe value of all the goods and services made in a place in a year: the size of its economy. The PSA measures it for every region, province and highly urbanized city. Counted at 2018 prices, it leaves out the rise in prices, so one year can be set beside another.More in the glossary
₱131.4 billion[23]Its gross domestic product at current prices; ₱107.5 billion at 2018 prices.
Growth, 2024–2025
4.2%[24]How much more it made than the year before, at 2018 prices.
For each person, 2025
₱188,104[25]Its economy divided by its projected population, at current prices, as the PSA works it out.
Poverty, 2023Poverty incidenceHow many of every 100 people live in families whose income is below the poverty line: what a person needs in a year for food and other basic needs, as the PSA sets it for each province. It is an estimate, from a survey or, for a town, a statistical model, so the PSA gives a range it is likely to fall in.More in the glossary
7.0% of people[26]Below the poverty line, by the PSA's survey.
Income classIncome classThe Department of Finance sorts provinces, cities and municipalities into classes by their average yearly income over recent years: 1st class has the most. It measures the local government's income, not how well off its people are.More in the glossary
1st class[4]
About 7 of every 100 people in Ilocos Sur lived below the poverty line in 2023 (7.0%)[26]

The PSA's survey puts it between 4.8% and 9.3%, with 95% confidence. The poverty line was ₱35,599 a person for the year.

The PSA notes: Those with CVs higher than 10% in 2023 poverty incidence among population should be used with caution.

Public places

  • 151government offices
  • 44hospitals and health centres
  • 604schools
  • 75places of worship
  • 20markets
  • 13stations and terminals
  • 22parks
  • 4beaches
  • 32monuments and memorials

Counted from OpenStreetMap[3, 8]. Each town's page lists its own; this page lists the stations, parks, beaches and monuments.

Where a kind has more than 8, this page shows 6: first those with “Ilocos Sur” in their name, then one in each of its most populous cities and municipalities.

Stations and terminals13

7 more stations and terminals are listed on the pages of the cities and municipalities they stand in. See the 34 cities and municipalities of Ilocos Sur

Parks22

16 more parks are listed on the pages of the cities and municipalities they stand in. See the 34 cities and municipalities of Ilocos Sur

Beaches4

Monuments and memorials32

26 more monuments and memorials are listed on the pages of the cities and municipalities they stand in. See the 34 cities and municipalities of Ilocos Sur

As OpenStreetMap maps them on September 30, 2026. Map data © OpenStreetMap contributors, under the Open Database License.

Government & Leaders

A governor leads Ilocos Sur. Its local laws, called ordinances, are passed by the Sangguniang Panlalawigan (the provincial board), led by the vice governor. The governor, the vice governor and the board's elected members serve three-year terms, and none may serve more than three in a row.[20, 21]

Capital
Vigan City[4]

2 legislative districtsLegislative districtThe area that elects one member of the House of Representatives. A big province or city may have several.More in the glossary[22]

Each district elects one member of the House of Representatives. These are the districts as the laws drew them for the 2025 elections.

1st district

2nd district

Leaders

The governor and vice governor elected at each election since 2001, as COMELEC's lists of the elected name them, and those in office now, as the DILG's directory lists them.

  1. 2025–2028In office as of February 2026

    Governor
    Jeremias Crisologo Singson[27]
    Vice governor
    Ryan Luis Verzosa Singson[27]

  2. 2022–2025

    Governor
    Jeremias Crisologo Singson[28]
    Vice governor
    Ryan Luis Verzosa Singson[28]

  3. 2019–2022

    Governor
    Ryan Luis Verzosa Singson[29]
    Vice governor
    Jeremias Crisologo Singson[29]

  4. 2016–2019

    Governor
    Ryan Luis Verzosa Singson[30]
    Vice governor
    Jeremias Crisologo Singson[30]

  5. 2013–2016

    Governor
    Ryan Luis Verzosa Singson[31]
    Vice governor
    Deogracias Victor “DV” Barbers Savellano[31]

  6. 2010–2013

    Governor
    Luis Crisologo Singson[32]
    Vice governor
    Deogracias Barbers Savellano V[32]

  7. 2007–2010

    Governor
    Deogracias Victor Barbers Savellano[33]
    Vice governor
    Jeremias Crisologo Singson[33]

  8. 2004–2007

    Governor
    Luis Crisologo Singson[34]
    Vice governor
    Deogracias Victor Barbers Savellano[34]

  9. 2001–2004

    Governor
    Deogracias Victor B. Savellano[35]
    Vice governor
    Jeremias C. Singson[35]
Governors and vice governors of Ilocos Sur, by term
TermGovernorVice governor
2025–2028In office as of February 2026Jeremias Crisologo Singson[27]Ryan Luis Verzosa Singson[27]
2022–2025Jeremias Crisologo Singson[28]Ryan Luis Verzosa Singson[28]
2019–2022Ryan Luis Verzosa Singson[29]Jeremias Crisologo Singson[29]
2016–2019Ryan Luis Verzosa Singson[30]Jeremias Crisologo Singson[30]
2013–2016Ryan Luis Verzosa Singson[31]Deogracias Victor “DV” Barbers Savellano[31]
2010–2013Luis Crisologo Singson[32]Deogracias Barbers Savellano V[32]
2007–2010Deogracias Victor Barbers Savellano[33]Jeremias Crisologo Singson[33]
2004–2007Luis Crisologo Singson[34]Deogracias Victor Barbers Savellano[34]
2001–2004Deogracias Victor B. Savellano[35]Jeremias C. Singson[35]

History & Identity

Created
A province of its own since a royal decree of 2 February 1818 divided Ilocos into Ilocos Norte and Ilocos Sur; its civil government was set up under Act No. 205, enacted 16 August 1901, with Vigan as its capital[9, 10, 11]

How it got its name

Local traditionThe province's account says the people of the coastal plains of northwestern Luzon built their villages by coves called looc and were known as Ylocos, a word it says meant "from the lowlands". The Spaniards later called the region Ylocos or Ilocos, and its people Ilocanos.[9]

Local traditionThe region's older name was Samtoy, which the same account derives from sao ditoy, our language.[9, 10]

A royal decree of 2 February 1818 divided Ilocos in two, and the southern half became Ilocos Sur.[9, 10]

Its story

Juan de Salcedo's expedition reached Vigan on 13 June 1572 and made it its headquarters. Salcedo became the encomendero of Vigan and lieutenant governor of the Ilocos.[9]

Augustinian missionaries founded its parishes, from Santa in 1576 to Candon in 1591, and in 1641 built a church at Vigan that later became the cathedral of Nueva Segovia.[10]

After Diego Silang was assassinated on 28 May 1763, his widow Gabriela led the revolt until she was captured and hanged on 20 September 1763. A later revolt, led by Ambaristo, rose against the government's monopoly of basi, the native wine, and was put down by regular troops.[10]

Sources differSources differ on that revolt's year. The province's 2011 history dates it 16 September 1817, while presidential proclamations that make 16 September a special day in Piddig, Ilocos Norte, where it broke out, mark the Basi Revolt of 1807, the year the National Museum and the Philippine News Agency also give. The agency adds that historians name Pedro Mateo and Salarogo Ambaristo as its leaders.[10, 12, 13, 14, 15, 16]

The 1818 decree gave Ilocos Sur the north of today's La Union, as far as Namacpacan, now Luna, and all of Abra. The province keeps 2 February as its founding anniversary.[9, 17]

Gregorio del Pilar fell at Tirad Pass on 2 December 1899, holding back the Americans, who took Vigan two days later. A civil government was set up on 1 September 1901, with Mena Crisologo, a delegate to the Malolos Congress, as its first governor.[10, 11]

Act No. 1306 made Abra a sub-province of Ilocos Sur in 1905, and Act No. 2683 of 1917 let it become a province again, fixing Ilocos Sur's present boundary.[9, 18, 19]

Timeline

  1. 13 June 1572

    Juan de Salcedo's expedition reaches Vigan.[9]

  2. 1641

    The Augustinians build a church at Vigan, later the cathedral of Nueva Segovia.[10]

  3. 20 September 1763

    Gabriela Silang is hanged after leading the revolt her husband began.[10]

  4. 2 February 1818

    A royal decree separates Ilocos Norte from Ilocos Sur.[9, 10]

  5. 2 December 1899

    Gregorio del Pilar is killed at Tirad Pass.[10]

  6. 16 August 1901

    Act No. 205 extends the Provincial Government Act to Ilocos Sur, with Vigan as its capital.[11]

  7. 1 September 1901

    The civil provincial government is set up under Mena Crisologo.[10]

  8. 1 April 1905

    Under Act No. 1306, Abra becomes a sub-province of Ilocos Sur.[18]

  9. 9 March 1917

    Act No. 2683 provides for Abra to become a province again.[19]

  10. 10 December 1941

    Japanese forces land at Vigan, Santa and Caoayan.[10]

  11. 18 April 1945

    Ilocos Sur is declared liberated.[10]

Nearby

Ilocos Sur shares a border with 5 places.

How it compares

Ilocos Sur beside Ilocos Region, and where it stands among the provinces of Ilocos Region.

Ilocos Sur beside Ilocos Region
FigureIlocos SurIlocos RegionRank among the provinces of Ilocos Region
People, 2024CensusA count of every person in the country, all on one day. The 2024 census counted people as they were on 1 July 2024.More in the glossary709,991[1, 2]5,342,4533rd of 4
Growth a year, 2020–2024Growth a yearHow fast the number of people changed each year between two censuses. 1% a year means about 1 more person for every 100 people, each year.More in the glossary0.13% a year[1, 2]slower0.19% a year3rd of 4
People per km², 2024Population densityHow crowded a place is on average: its people divided by its land area. 1,000 people per square kilometre is 10 people per hectare, a square of 100 by 100 metres.More in the glossary268[7]less crowded4163rd of 4
Land areaLand areaThe land inside the place's official boundary. A square kilometre is a square 1 km on each side, about the size of 140 football fields.More in the glossary2,651.49 km²[7]12,830.62 km²3rd of 4
People in each household, 2024HouseholdA person living alone, or people who sleep in the same home and share their meals. A family may be one household or several.More in the glossary3.8[1, 2]higher3.7not ranked
In urban barangays, 2024Urban barangayThe PSA counts a barangay as urban when it has 5,000 people or more, or a big employer, or several businesses and public services close by. Every barangay in Metro Manila is urban.More in the glossary10.6%[6]lower22.8%not ranked

Sources

Page updated October 8, 2026. Sources checked by Scene October 8, 2026.
  1. 1.Philippine Statistics Authority. Population and Annual Population Growth Rate of the Philippines and its Regions, Provinces, and Highly Urbanized Cities Based on the 2010, 2015, 2020 and 2024 Population Census (OpenSTAT table 0211A6DAPG0). Published August 7, 2026. Read by Scene October 2, 2026. CC BY (PSA Terms of Use). Open the source
  2. 2.Philippine Statistics Authority. Total Population, Household Population, and Number of Households by Province, City, Municipality, and Barangay as of 01 July 2024: Ilocos Region (OpenSTAT table 0011A6DTPH0). Published August 4, 2026. Read by Scene October 2, 2026. CC BY (PSA Terms of Use). Open the source
  3. 3.UN OCHA, from the PSA and NAMRIA. Philippines: Subnational Administrative Boundaries (COD-AB), barangay layer. Published February 13, 2025. Read by Scene September 25, 2026. CC BY-IGO 3.0. Open the source
  4. 4.Philippine Statistics Authority. Philippine Standard Geographic Code (PSGC), 2nd Quarter 2026: Publication Datafile. Published June 30, 2026. Read by Scene September 24, 2026. CC BY (PSA Terms of Use). Open the source
  5. 5.Philippine Statistics Authority. Household Population by Age-Group Region, Province, and Highly Urbanized City: Philippines, 2024 Census of Population (OpenSTAT table 0201A6DPAG0). Published August 7, 2026. Read by Scene October 2, 2026. CC BY (PSA Terms of Use). Open the source
  6. 6.Philippine Statistics Authority. Total Population and Urban Population by Urban Classification and Region, Province, Highly Urbanized City, City/Municipality and Barangay: Philippines, 2024 (OpenSTAT table 0231A6DPUP0). Published August 7, 2026. Read by Scene October 2, 2026. CC BY (PSA Terms of Use). Open the source
  7. 7.Philippine Statistics Authority, from the Land Management Bureau (DENR). Population, Land Area, Population Density, and Percent Change in Population Density by Region, Province/Highly Urbanized City, and City/Municipality: 2015, 2020, and 2024 (OpenSTAT table 0221A6DLPD0). Published August 7, 2026. Read by Scene October 2, 2026. CC BY (PSA Terms of Use). Open the source
  8. 8.OpenStreetMap contributors. Named public places in OpenStreetMap: schools, hospitals and health centres, places of worship, government offices, markets, stations, parks, beaches and monuments, from Geofabrik's extract of the Philippines. Published September 30, 2026. Read by Scene October 2, 2026. ODbL 1.0. Open the source
  9. 9.Provincial Government of Ilocos Sur. History Of Ilocos Sur (2011 site, as archived by the Internet Archive on 8 August 2011). Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  10. 10.Provincial Government of Ilocos Sur. Heart of Ilocandia (2011 site, as archived by the Internet Archive on 10 July 2011). Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  11. 11.United States Philippine Commission. Act No. 205: An Act Extending the Provisions of the Provincial Government Act and Its Amendments to the Province of Ilocos Sur. Published August 16, 1901. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  12. 12.Office of the President of the Philippines. Proclamation No. 673, s. 2024: Declaring Monday, 16 September 2024, a Special (Non-Working) Day in the Municipality of Piddig, Province of Ilocos Norte. Published August 29, 2024. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  13. 13.Office of the President of the Philippines. Proclamation No. 981, s. 2025: Declaring Tuesday, 16 September 2025, a Special (Non-Working) Day in the City of Municipality of Piddig, Province of Ilocos Norte. Published July 18, 2025. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  14. 14.Office of the President of the Philippines. Proclamation No. 1402, s. 2026: Declaring Wednesday, 16 September 2026, a Special (Non-Working) Day in the Municipality of Piddig, Province of Ilocos Norte. Published August 26, 2026. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  15. 15.National Museum of the Philippines. The Basi Revolt. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  16. 16.Philippine News Agency. Basi Revolt commemoration yields 112 units of blood donation (as archived by the Internet Archive on 30 April 2025). Published September 16, 2024. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  17. 17.Office of the President of the Philippines. Proclamation No. 1151, s. 2026: Declaring Monday, 02 February 2026, a Special (Non-Working) Day in the Province of Ilocos Sur. Published January 23, 2026. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  18. 18.Philippine Commission. Act No. 1306: An Act Annexing the Province of Abra to the Province of Ilocos Sur, Making Appropriation for the Payment of Certain Outstanding Liabilities of the Province of Abra. and Providing for the Establishment of Civil Governments in the Settlements of Non-Christian Tribes in the Province of Ilocos Sur. Published February 28, 1905. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  19. 19.Philippine Legislature. Act No. 2683: An Act to Authorize the Segregation of the Subprovince of Abra from the Province of Ilocos Sur and the Reestablishment of the Former Province of Abra, and for Other Purposes. Published March 9, 1917. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  20. 20.Congress of the Philippines. Republic Act No. 7160: the Local Government Code of 1991. Published October 10, 1991. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  21. 21.1986 Constitutional Commission. The 1987 Constitution of the Republic of the Philippines. Published February 2, 1987. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  22. 22.1986 Constitutional Commission (text from the Chan Robles Virtual Law Library). Ordinance appended to the 1987 Constitution, apportioning the seats of the House of Representatives. Published February 2, 1987. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  23. 23.Philippine Statistics Authority. Gross Domestic Product by Province and HUC (OpenSTAT table 0012A5FPPA0). Published August 28, 2026. Read by Scene October 2, 2026. CC BY (PSA Terms of Use). Open the source
  24. 24.Philippine Statistics Authority. Gross Domestic Product by Province and HUC, Growth Rates (OpenSTAT table 0032A5FPPA2). Published August 28, 2026. Read by Scene October 2, 2026. CC BY (PSA Terms of Use). Open the source
  25. 25.Philippine Statistics Authority. Per Capita Gross Domestic Product by Province and HUC (OpenSTAT table 0092A5FPPA8). Published August 28, 2026. Read by Scene October 2, 2026. CC BY (PSA Terms of Use). Open the source
  26. 26.Philippine Statistics Authority (PSA). Table 2a. Annual Per Capita Poverty Threshold and Poverty Incidence Among Population with Measures of Precision, by Region, Province and Highly Urbanized Cities: 2018, 2021, and 2023 (OpenSTAT table 0041F3DF02A). Published August 15, 2024. Read by Scene October 2, 2026. CC BY (PSA Terms of Use). Open the source
  27. 27.Department of the Interior and Local Government (DILG). Directory of LGU Elective Officials for Term 2025-2028 as of February 2026 (its sheet: Consolidated List of Officials for Election Terms (2025-2028)), released through the FOI portal. Published February 2026. Read by Scene October 2, 2026. A work of the Government of the Philippines: RA 8293, Section 176 (no copyright subsists in it; exploiting it for profit needs the agency's prior approval). Open the source
  28. 28.Commission on Elections (COMELEC), Records and Statistics Division, ERSD. List of Elected Provincial Candidates, May 9, 2022 National and Local Elections. Published December 23, 2025. Read by Scene October 2, 2026. Public domain: comelec.gov.ph says "All content is in the public domain unless otherwise stated." Each list carries COMELEC's data privacy notice (RA 10173).. Open the source
  29. 29.Commission on Elections (COMELEC), Records and Statistics Division, ERSD. List of Elected Provincial Candidates, May 13, 2019 National and Local Elections. Published December 23, 2025. Read by Scene October 2, 2026. Public domain: comelec.gov.ph says "All content is in the public domain unless otherwise stated." Each list carries COMELEC's data privacy notice (RA 10173).. Open the source
  30. 30.Commission on Elections (COMELEC), Records and Statistics Division, ERSD. List of Elected Provincial Candidates, May 9, 2016 National and Local Elections. Published January 12, 2026. Read by Scene October 2, 2026. Public domain: comelec.gov.ph says "All content is in the public domain unless otherwise stated." Each list carries COMELEC's data privacy notice (RA 10173).. Open the source
  31. 31.Commission on Elections (COMELEC), Records and Statistics Division, ERSD. List of Elected Provincial Candidates, May 13, 2013 National and Local Elections. Published January 12, 2026. Read by Scene October 2, 2026. Public domain: comelec.gov.ph says "All content is in the public domain unless otherwise stated." Each list carries COMELEC's data privacy notice (RA 10173).. Open the source
  32. 32.Commission on Elections (COMELEC), Records and Statistics Division, ERSD. List of Elected Provincial Candidates, May 10, 2010 National and Local Elections. Published January 10, 2026. Read by Scene October 2, 2026. Public domain: comelec.gov.ph says "All content is in the public domain unless otherwise stated." Each list carries COMELEC's data privacy notice (RA 10173).. Open the source
  33. 33.Commission on Elections (COMELEC), Records and Statistics Division, ERSD. List of Elected Provincial Candidates, May 14, 2007 National and Local Elections. Published January 14, 2026. Read by Scene October 2, 2026. Public domain: comelec.gov.ph says "All content is in the public domain unless otherwise stated." Each list carries COMELEC's data privacy notice (RA 10173).. Open the source
  34. 34.Commission on Elections (COMELEC), Records and Statistics Division, ERSD. List of Elected Provincial Candidates, May 10, 2004 National and Local Elections. Published January 8, 2026. Read by Scene October 2, 2026. Public domain: comelec.gov.ph says "All content is in the public domain unless otherwise stated." Each list carries COMELEC's data privacy notice (RA 10173).. Open the source
  35. 35.Commission on Elections (COMELEC), Records and Statistics Division, ERSD. List of Elected Provincial Candidates, May 14, 2001 National and Local Elections (its pages are headed "LIST OF ELECTED MEMBER, HOUSE OF REPRESENTATIVES"). Published January 8, 2026. Read by Scene October 2, 2026. Public domain: comelec.gov.ph says "All content is in the public domain unless otherwise stated." Each list carries COMELEC's data privacy notice (RA 10173).. Open the source
  36. 36.European Union and the European Space Agency (Copernicus), from DLR and Airbus Defence and Space (WorldDEM). Copernicus DEM GLO-30: global digital surface model at 30 m, one-degree tiles (2021 release). Published 2021. Read by Scene October 2, 2026. Copernicus DEM GLO-30 licence: free, any use including commercial, with the Copernicus notice. Open the source
  37. 37.OpenStreetMap contributors, extract by Geofabrik. Named rivers, lakes, reservoirs, peaks and the coastline of the Philippines in OpenStreetMap (Geofabrik extract, cut by osmium). Published September 30, 2026. Read by Scene October 2, 2026. ODbL 1.0. Open the source
  38. 38.Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA), Climatology and Agrometeorology Division. Climate Map of the Philippines (1951-2010), Modified Coronas Climate Classification. Published August 2014. Read by Scene October 2, 2026. A work of the Government of the Philippines: no copyright (RA 8293 s.176.1); PAGASA's approval is needed to use it for profit. Open the source
  39. 39.Philippine Statistics Authority. 2015 Census of Population, Statistical Tables, Table 1: Population Enumerated in Various Censuses by City/Municipality, 1960-2015 (one workbook for each province, highly urbanized city and region). Published 2017. Read by Scene October 2, 2026. CC BY (PSA Terms of Use). Open the source
  40. 40.Philippine Statistics Authority. 2020 Census of Population and Housing: Table A (Population and Annual Growth Rate for the Philippines and its Regions, Provinces and Highly Urbanized Cities) and Table B (Population and Annual Growth Rates by Province, City and Municipality, by Region). Published July 2021. Read by Scene October 2, 2026. CC BY (PSA Terms of Use). Open the source

Scene adds what the sources do not print themselves: growth rates, shares, barangay areas and densities, coordinates, neighbours and distances, each computed from the figures and borders above. How each is made.

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Cite this page

Scene.ph. “Ilocos Sur.” Scene Atlas. Updated October 8, 2026. https://scene.ph/atlas/ilocos-sur