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Municipality

San Mariano

San Mariano is a municipality in Isabela, Cagayan Valley, Philippines. Its population was 61,876 in the 2024 census, and it has 36 barangays.

  • Population: 2024 Census
  • Places: PSGC 2Q 2026
  • Checked by Scene: October 8, 2026
  • Page updated: October 9, 2026
Colour byColours the map of San Mariano by the figure chosen; the key beside it says what each colour means.
Benito SolivenCauayan CityIlagan CityDinapigueDivilacanPalananSan GuillermoAlibadabad: 2,663 people, 294 per km², 2.99% a yearBinatug: 2,174 people, 96 per km², 0.40% a yearBitabian: 2,016 people, 367 per km², 1.13% a yearBuyasan: 787 people, 12 per km², −0.81% a yearCadsalan: 1,980 people, 77 per km², 1.93% a yearCasala: 1,600 people, 18 per km², 0.11% a yearCataguing: 1,819 people, 384 per km², 0.05% a yearDaragutan East: 1,442 people, 217 per km², −0.38% a yearDaragutan West: 1,923 people, 167 per km², 1.21% a yearDel Pilar: 1,713 people, 28 per km², −0.70% a yearDibuluan: 1,914 people, 9 per km², 0.39% a yearDicamay: 2,127 people, 24 per km², 1.34% a yearDipusu: 761 people, 384 per km², −0.19% a yearDisulap: 2,950 people, 30 per km², 0.24% a yearDisusuan: 642 people, 69 per km², 0.34% a yearGangalan: 1,799 people, 79 per km², 0.27% a yearIbujan: 886 people, 125 per km², 4.69% a yearLibertad: 1,392 people, 10 per km², 2.22% a yearMacayucayu: 837 people, 61 per km², 2.86% a yearMallabo: 866 people, 581 per km², 0.36% a yearMarannao: 1,093 people, 135 per km², 0.81% a yearMinanga: 4,537 people, 23 per km², −0.65% a yearOld San Mariano: 2,348 people, 192 per km², 0.77% a yearPalutan: 1,030 people, 282 per km², 0.21% a yearPanninan: 834 people, 57 per km², 0.61% a yearZone I: 1,459 people, 1,517 per km², −2.04% a yearZone II: 2,413 people, 11,382 per km², −0.49% a yearZone III: 3,503 people, 2,275 per km², −1.44% a yearSan Jose: 3,007 people, 19 per km², 3.34% a yearSan Pablo: 940 people, 287 per km², −0.05% a yearSan Pedro: 754 people, 87 per km², 5.59% a yearSta. Filomena: 2,513 people, 424 per km², −0.08% a yearTappa: 1,094 people, 16 per km², 0.40% a yearUeg: 2,131 people, 173 per km², 4.78% a yearZamora: 442 people, 137 per km², −1.41% a yearBalagan: 1,487 people, 121 per km², 1.15% a year

People · 2024 Census

  • Under 690
  • 690 to 1,100
  • 1,100 to 1,800
  • 1,800 to 3,100
  • 3,100 and over

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

Density · people per km², 2024

  • Under 160
  • 160 to 340
  • 340 to 700
  • 700 to 2,600
  • 2,600 and over

The same steps colour every map of barangays 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

  • PeopleSources

    61,876

    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 20.3% from 2010 to 2024

  • Rank by peopleSources

    9th

    of the 37 cities and municipalities of Isabela 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 4 of every 100 people in Isabela lived in San Mariano in 2024 (3.57%)

  • Inside itSources

    36

    barangays

  • LandSources

    1,460.96 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: San Mariano's land would fill a square about 38.2 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: 42 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 1 person per 2 hectares 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

    15,546

    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

    4.0 people in each, on average, in 2024

  • Town or countrySources

    4.1%

    About 4 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
0203131000[4]Formerly 023131000
ZIP code
3332[15, 16, 17]

People

San Mariano had 61,876 people in the 2024 census, up 20.3% 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.

San Mariano had the 9th most people of the 37 cities and municipalities of Isabela in 2024[1]
  1. 6Alicia74,699
  2. 7San Mateo67,433
  3. 8Roxas66,593
  4. 9San Mariano61,876
  5. 10Ramon57,412
  6. 11Cabagan55,445
  7. 12Cordon46,688
All 37 cities and municipalities of Isabela
In 2024, the 10 barangays with the most people held about 46 of every 100 of its people[2]
  1. Minanga4,5377 in 100
  2. Zone III3,5036 in 100
  3. San Jose3,0075 in 100
  4. Disulap2,9505 in 100
  5. Alibadabad2,6634 in 100
  6. Sta. Filomena2,5134 in 100
  7. Zone II2,4134 in 100
  8. Old San Mariano2,3484 in 100
  9. Binatug2,1744 in 100
  10. Ueg2,1313 in 100
See all 36 barangays of San Mariano
Age structure · 2020 Census[35]People living in households, by age and sex
  • About 32 of every 100 are children under 15 (32.1%)
  • About 64 of every 100 are of working age, 15 to 64 (63.7%)
  • About 4 of every 100 are 65 or older (4.2%)
MenWomen

The figures by age

People by age group, men and women
AgePeopleMenWomen
0 - 45,9743,1062,868
5 - 96,6593,4613,198
10 - 146,6513,5003,151
15 - 195,9823,0232,959
20 - 245,7872,9732,814
25 - 295,3232,7312,592
30 - 344,6322,4832,149
35 - 393,7952,0471,748
40 - 443,5001,8811,619
45 - 492,9331,5721,361
50 - 542,4931,2911,202
55 - 592,2071,1701,037
60 - 641,663872791
65 - 691,157553604
70 - 74602277325
75 - 79394155239
80 years and over372137235

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
61,876[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
15,546[1, 2]
People in each household, 2024
4.0 on average[1, 2]
Share of Isabela, 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
3.57%[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
4.1% (2,513 people)[5]
Men and women, 2020
31,232 men, 28,892 women[35]People living in households
Population at each census, with its source
CensusPopulationGrowth since the census beforeHouseholdsPeople per household
2024as of July 1, 202461,876[1, 2]0.69% a year15,5464.0
2020as of May 1, 202060,124[1]1.75% a year——
2015as of August 1, 201555,370[1]1.41% a year——
2010as of May 1, 201051,438[1]———
2007as of August 1, 2007; as it was then44,718[33]1.10% a year——
2000as of May 1, 2000; on today’s borders41,309[33, 34]1.88% a year——
1995as of September 1, 1995; as it was then37,861[33]0.79% a year——
1990as of May 1, 1990; as it was then36,295[33]1.32% a year——
1980as of May 1, 1980; as it was then31,839[33]4.82% a year——
1975as of May 1, 1975; as it was then25,157[33]4.47% a year——
1970as of May 6, 1970; as it was then20,227[33]2.92% a year——
1960as of February 15, 1960; as it was then15,064[33]———

Barangays

San Mariano is made up of 36 barangays.
Barangays of San Mariano. Each column heading sorts the table.
[2, 3, 5, 6, 7]Share (2024)Urban or rural
Alibadabad2,6634.3%2.99% a yearabout 9.07 km²Rural
Balagan1,4872.4%1.15% a yearabout 12.29 km²Rural
Binatug2,1743.51%0.40% a yearabout 22.73 km²Rural
Bitabian2,0163.26%1.13% a yearabout 5.50 km²Rural
Buyasan7871.27%−0.81% a yearabout 64.42 km²Rural
Cadsalan1,9803.2%1.93% a yearabout 25.57 km²Rural
Casala1,6002.59%0.11% a yearabout 90.18 km²Rural
Cataguing1,8192.94%0.05% a yearabout 4.74 km²Rural
Daragutan East1,4422.33%−0.38% a yearabout 6.65 km²Rural
Daragutan West1,9233.11%1.21% a yearabout 11.52 km²Rural
Del Pilar1,7132.77%−0.70% a yearabout 60.75 km²Rural
Dibuluan1,9143.09%0.39% a yearabout 217.28 km²Rural
Dicamay2,1273.44%1.34% a yearabout 89.46 km²Rural
Dipusu7611.23%−0.19% a yearabout 1.98 km²Rural
Disulap2,9504.77%0.24% a yearabout 99.03 km²Rural
Disusuan6421.04%0.34% a yearabout 9.27 km²Rural
Gangalan1,7992.91%0.27% a yearabout 22.68 km²Rural
Ibujan8861.43%4.69% a yearabout 7.06 km²Rural
Libertad1,3922.25%2.22% a yearabout 139.49 km²Rural
Macayucayu8371.35%2.86% a yearabout 13.76 km²Rural
Mallabo8661.4%0.36% a yearabout 1.49 km²Rural
Marannao1,0931.77%0.81% a yearabout 8.09 km²Rural
Minanga4,5377.33%−0.65% a yearabout 193.24 km²Rural
Old San Mariano2,3483.79%0.77% a yearabout 12.20 km²Rural
Palutan1,0301.66%0.21% a yearabout 3.65 km²Rural
Panninan8341.35%0.61% a yearabout 14.55 km²Rural
San Jose3,0074.86%3.34% a yearabout 154.46 km²Rural
San Pablo9401.52%−0.05% a yearabout 3.27 km²Rural
San Pedro7541.22%5.59% a yearabout 8.70 km²Rural
Sta. Filomena2,5134.06%−0.08% a yearabout 5.92 km²Urban
Tappa1,0941.77%0.40% a yearabout 67.75 km²Rural
Ueg2,1313.44%4.78% a yearabout 12.33 km²Rural
Zamora4420.71%−1.41% a yearabout 3.22 km²Rural
Zone I1,4592.36%−2.04% a yearabout 0.962 km²Rural
Zone II2,4133.9%−0.49% a yearabout 0.212 km²Rural
Zone III3,5035.66%−1.44% a yearabout 1.54 km²Rural

Areas are approximate: each is measured inside the barangay's border on UN OCHA's map, which is a guide, not the legal boundary.

Land & Environment

San Mariano covers 1,460.96 km² of land, 42 people for every km² in 2024. Its land rises to 1,364 m above the sea and it lies inland.
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
1,460.96 km²[6]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
42 people per km²[6]
Coordinates
16.92722° N, 122.13458° E[3]The point inside its border farthest from every edge, so it always falls within the place.
Height above the sea[30]
Lowest
19 m
Average
388 m
Highest
1,364 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

No coastline: it lies inland.

Rivers[31]

  1. Ilagan River70.4 of 183.1 km
  2. Disabungan River49.3 km
  3. Disulap River35.1 km
  4. Palanan River18.9 of 111.5 km
  5. Dimaliw River18.4 of 47.0 km
  6. Catalangan River16.4 km
  7. Dibenbinan River8.3 of 36.3 km

Peaks[31]

  1. Mount Palanan1,195 m

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 III[32]

No clear rainiest time of year, and a short dry season of one to three months, in December to February or in March to May.

Covers about 72 of every 100 parts of its land. Read by Scene off PAGASA's climate map, so approximate: the type that covers most of the place's land.

Life & Economy

About 25 of every 100 people lived below the poverty line in 2021.
Poverty, 2021Poverty 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
25.0% of people[20]Below the poverty line, by the PSA's estimate for every town.
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 25 of every 100 people in San Mariano lived below the poverty line in 2021 (25.0%)[20]

The PSA's model for every town puts it between 20.5% and 29.5%, with 90% confidence.

The PSA rates this estimate's reliability as acceptable rather than high: read it as a guide.

Public places

  • 2government offices
  • 2hospitals and health centres
  • 50schools
  • 1place of worship
  • 1market
  • 1park

Counted from OpenStreetMap[3, 8]. Schools, places of worship, barangay halls and places known only by a common name, such as a chapel, are listed on each barangay's page.

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

Government & Leaders

A mayor leads San Mariano. Its local laws, called ordinances, are passed by the Sangguniang Bayan (the municipal council), led by the vice mayor. The mayor, the vice mayor and the council's elected members serve three-year terms, and none may serve more than three in a row.[13, 14]

Legislative districtLegislative districtThe area that elects one member of the House of Representatives. A big province or city may have several.More in the glossary
2nd district of Isabela[18, 19]

Leaders

The mayor and vice mayor 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

    Mayor
    Ana Cristina Siquian Go[21]
    Vice mayor
    Edgar Talosig Go[21]

  2. 2022–2025

    Mayor
    Edgar Talosig Go[22]
    Vice mayor
    Dean Anthony Guzman Domalanta[22]

  3. 2019–2022

    Mayor
    Edgar Talosig Go[23]
    Vice mayor
    Dean Anthony Guzman Domalanta[23]

  4. 2016–2019

    Mayor
    Edgar Talosig Go[24]
    Vice mayor
    Dean Anthony Guzman Domalanta[24]

  5. 2013–2016

    Mayor
    Dean Anthony Guzman Domalanta[25]
    Vice mayor
    Edgar Talosig Go[25]

  6. 2010–2013

    Mayor
    Edgar Talosig Go[26]
    Vice mayor
    Dean Anthony Guzman Domalanta[26]

  7. 2007–2010

    Mayor
    Edgar Talosig Go[27]
    Vice mayor
    Dean Anthony Guzman Domalanta[27]

  8. 2004–2007

    Mayor
    Edgar Go[28]
    Vice mayor
    Eduardo Viernes[28]

  9. 2001–2004

    Mayor
    Jesus C. Miranda[29]
    Vice mayor
    Eduardo G. Viernes[29]
Mayors and vice mayors of San Mariano, by term
TermMayorVice mayor
2025–2028In office as of February 2026Ana Cristina Siquian Go[21]Edgar Talosig Go[21]
2022–2025Edgar Talosig Go[22]Dean Anthony Guzman Domalanta[22]
2019–2022Edgar Talosig Go[23]Dean Anthony Guzman Domalanta[23]
2016–2019Edgar Talosig Go[24]Dean Anthony Guzman Domalanta[24]
2013–2016Dean Anthony Guzman Domalanta[25]Edgar Talosig Go[25]
2010–2013Edgar Talosig Go[26]Dean Anthony Guzman Domalanta[26]
2007–2010Edgar Talosig Go[27]Dean Anthony Guzman Domalanta[27]
2004–2007Edgar Go[28]Eduardo Viernes[28]
2001–2004Jesus C. Miranda[29]Eduardo G. Viernes[29]

History & Identity

Created
Act No. 3416, approved 7 December 1927, converted the municipal district of San Mariano in Isabela into a regular municipality. It kept its name and its old territory.[9]

How it got its name

Local traditionA local account says the place was first called Angela, after the wife of the earliest settler, Mariano Kalingog. It was renamed San Mariano in honor of Mariano after both of them had died.[11]

Its story

San Mariano began as a barrio of Ilagan, the capital town of Isabela.[11]

Sources differA regional government page says it became a municipal district in 1920 under Executive Order No. 25. The 1917 Revised Administrative Code already lists San Mariano among the province's municipal districts, so the 1920 date is not settled.[11, 12]

Timeline

  1. 1917

    The Revised Administrative Code lists San Mariano among the municipal districts of Isabela.[12]

  2. 1920

    Sources differA regional government page says San Mariano became a municipal district under Executive Order No. 25 of 1920. The order itself was not found.[11]

  3. 7 December 1927

    Act No. 3416 converted the municipal district of San Mariano into a regular municipality.[9]

Nearby

San Mariano shares a border with 7 places.

How it compares

San Mariano beside Isabela, and where it stands among the cities and municipalities of Isabela.

San Mariano beside Isabela
FigureSan MarianoIsabelaRank among the cities and municipalities of Isabela
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 glossary61,876[1, 2]1,733,0489th of 37
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 glossary0.69% a year[1, 2]faster0.50% a year10th of 37
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 glossary42[6]less crowded13832nd of 37
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 glossary1,460.96 km²[6]12,602.70 km²1st of 37
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 glossary4.0[1, 2]higher3.8not 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 glossary4.1%[5]lower20.9%not ranked

How far, in a straight line[3]

Ilagan City, the capital of Isabela
27.7 km northwest
Manila
287.2 km southwest

In a straight line between the points inside each place farthest from its edges, not by road.

The nearest towns and cities[3]

  1. Benito SolivenIsabela19.0 km west
  2. Ilagan CityIsabela27.7 km northwest
  3. PalananIsabela28.6 km east
  4. NaguilianIsabela28.7 km west
  5. San GuillermoIsabela33.5 km south
  6. Cauayan CityIsabela36.5 km west

Sources

Page updated October 9, 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: Cagayan Valley (OpenSTAT table 0021A6DTPH1). 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. 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
  6. 6.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
  7. 7.Philippine Statistics Authority. Philippine Standard Geographic Code (PSGC), 4th Quarter 2022: Publication Datafile, with the 2015 and 2020 census counts (the PSA's file, as the Internet Archive keeps it). Published December 31, 2022. 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.The Lawphil Project, Arellano Law Foundation. Act No. 3416, December 07, 1927. Published December 7, 1927. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  10. 10.Municipality of San Mariano, Isabela. Official website. Read by Scene October 3, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  11. 11.Regional Development Council 2, Cagayan Valley (Region 2 investment portal). Cities and municipalities of Isabela. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  12. 12.Philippine Legislature (via National Library of the Philippines Digital Collections). Act No. 2711: An Act amending the Administrative Code. Published March 10, 1917. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  13. 13.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
  14. 14.1986 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
  15. 15.Philippine Postal Corporation (PHLPost). ZIP Code Locator. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1; a government-owned corporation's work is the Government's, Section 171.9). Open the source
  16. 16.Philippine Postal Corporation (PHLPost). ZIP Code Locator, as the Internet Archive captured it on 2022-05-21 (its SHA-1 matches the Archive's index). Published May 21, 2022. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1; a government-owned corporation's work is the Government's, Section 171.9). Open the source
  17. 17.Philippine Postal Corporation (PHLPost). Philippine ZIP Codes (the directory "ZipCode 2019.pdf", made 2019-12-02), as the Internet Archive keeps it (its SHA-1 matches the Archive's index). Published December 2, 2019. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1; a government-owned corporation's work is the Government's, Section 171.9). Open the source
  18. 18.Congress of the Philippines. Republic Act No. 11080: An Act reapportioning the Province of Isabela into six (6) legislative districts. Published September 27, 2018. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  19. 19.Commission on Elections (COMELEC). 2025 National and Local Elections: results, certificates of canvass of every province, city and municipality. Published May 2025. Read by Scene October 2, 2026. Philippine government work, no copyright (Republic Act No. 8293, Section 176.1). Open the source
  20. 20.Philippine Statistics Authority. Municipal and City Level Small Area Poverty Estimates; 2018 and 2021 (the PSA's workbook "2018 - 2021 SAE_with PSGC_noHUC.xlsx", sheet "2018-2021_NoHUC", as the Internet Archive keeps it). Published April 2, 2024. Read by Scene October 2, 2026. CC BY (PSA Terms of Use). Open the source
  21. 21.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
  22. 22.Commission on Elections (COMELEC), Records and Statistics Division, ERSD. List of Elected City/Municipal 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
  23. 23.Commission on Elections (COMELEC), Records and Statistics Division, ERSD. List of Elected City/Municipal 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
  24. 24.Commission on Elections (COMELEC), Records and Statistics Division, ERSD. List of Elected City/Municipal Candidates, May 9, 2016 National and Local Elections (its pages are headed "LIST OF ELECED CITY/MUNICIPAL CANDIDATES"). 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
  25. 25.Commission on Elections (COMELEC), Records and Statistics Division, ERSD. List of Elected City/Municipal 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
  26. 26.Commission on Elections (COMELEC), Records and Statistics Division, ERSD. List of Elected City/Municipal Candidates, May 10, 2010 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
  27. 27.Commission on Elections (COMELEC), Records and Statistics Division, ERSD. List of Elected City/Municipal 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
  28. 28.Commission on Elections (COMELEC), Records and Statistics Division, ERSD. List of Elected City/Municipal Candidates, May 10, 2004 National and Local Elections (its pages are headed "LIST OF CITY/MUNICIPAL CANDIDATES"). 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
  29. 29.Commission on Elections (COMELEC), Records and Statistics Division, ERSD. List of Elected City/Municipal Candidates, May 14, 2001 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
  30. 30.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
  31. 31.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
  32. 32.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
  33. 33.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
  34. 34.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
  35. 35.Philippine Statistics Authority. 2020 Census of Population and Housing: Household Population by Age Group and Sex, for the Philippines and its regions, provinces, cities and municipalities (revised file, psa.gov.ph/system/files/phcd/2022-12/). Published December 2022. Read by Scene October 8, 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.

See something wrong on this page? Write to hello@scene.ph with the page address. We check every report against the source.

Cite this page

Scene.ph. “San Mariano, Isabela.” Scene Atlas. Updated October 9, 2026. https://scene.ph/atlas/isabela/san-mariano