Isabela

Summary data
Map of the Philippines highlighting Isabela
Typeprovince
Island groupLuzon
RegionCagayan Valley (Region II)
Cities3
Municipalities35
Barangays1,055
Coastal/Landlockedcoastal
Marine waterbodiesPhilippine Sea
Area (2007)12,414.93 km2 (4,793.43 sq mi)
Population (2015)1,593,566
Density (2015)128 / km2 (332 / sq mi)

Isabela is a province in the Philippines situated in the Cagayan Valley region occupying the northeastern section of Luzon. Its capital is the City of Ilagan.

The province has a land area of 12,414.93 square kilometers or 4,793.43 square miles. Its population as determined by the 2015 Census was 1,593,566. This represented 46.17% of the total population of the Cagayan Valley region, 2.77% of the overall population of the Luzon island group, or 1.58% of the entire population of the Philippines. Based on these figures, the population density is computed at 128 inhabitants per square kilometer or 332 inhabitants per square mile.

Map

Isabela is bordered, clockwise from the North, by Cagayan, Philippine Sea, Aurora, Quirino, Nueva Vizcaya, and Ifugao, Mountain Province, Kalinga.

details
Map of the Philippines with Isabela highlighted in redMap of Isabela showing its component cities and municipalitiesAliciaAngadananAuroraBenito SolivenBurgosCabaganCabatuanCauayanCordonDelfin AlbanoDinapigueDivilacanEchagueGamuIlaganJonesLunaMaconaconMalligNaguilianPalananQuezonQuirinoRamonReina MercedesRoxasSan AgustinSan GuillermoSan IsidroSan ManuelSan MarianoSan MateoSan PabloSanta MariaSantiagoSanto TomasTumauini

Local government units

Isabela has 35 municipalities and 3 cities. The total number of barangays in the province is 1,055.

details
NameTypePopulation (2015)Population (2010)Annual Population Growth Rate (2010‑2015)Area (2007), in km2Density (2015), per km2Brgy count
Aliciamunicipality71,50464,6871.93%154.1046434
Angadananmunicipality43,06140,1431.34%204.4021159
Auroramunicipality35,01733,0451.11%115.5630333
Benito Solivenmunicipality29,62427,3371.54%184.4016129
Burgosmunicipality23,78422,5211.04%73.1032514
Cabaganmunicipality50,17445,7321.78%430.4011726
Cabatuanmunicipality39,41337,2991.06%72.0054722
Cauayancity (CC)129,523122,3351.09%336.4038565
Cordonmunicipality42,92640,8770.94%144.0029826
Delfin Albanomunicipality26,61425,4220.88%189.0014129
Dinapiguemunicipality5,0055,484-1.73%574.4096
Divilacanmunicipality5,6875,0342.35%889.49612
Echaguemunicipality79,09474,6801.10%680.8011664
Gamumunicipality29,90428,6570.81%129.4023116
Ilagancity (CC), capital145,568135,1741.42%1,166.2612591
Jonesmunicipality45,66644,2180.62%670.146842
Lunamunicipality19,32618,0911.27%45.7042319
Maconaconmunicipality4,2533,6153.14%538.66810
Malligmunicipality30,45928,3451.38%133.4022818
Naguilianmunicipality31,90229,4911.51%169.8118825
Palananmunicipality17,26016,0941.34%880.242017
Quezonmunicipality25,86024,5221.02%189.9013615
Quirinomunicipality24,50122,2851.82%126.2019421
Ramonmunicipality52,70749,8121.08%135.1739019
Reina Mercedesmunicipality26,99823,4972.68%57.1447220
Roxasmunicipality61,77357,6991.31%184.8033426
San Agustinmunicipality22,88021,7970.93%278.408223
San Guillermomunicipality20,20018,4231.77%325.496226
San Isidromunicipality24,86122,7581.70%71.9034613
San Manuelmunicipality31,89630,4070.91%112.7728319
San Marianomunicipality55,37051,4381.41%1,469.503836
San Mateomunicipality64,50560,7921.14%120.6053533
San Pablomunicipality25,38422,0402.73%637.904017
Santa Mariamunicipality25,38222,9391.95%140.0018120
Santiagocity (ICC)134,830132,8040.29%255.5052837
Santo Tomasmunicipality23,00521,6881.13%60.7037927
Tumauinimunicipality67,65058,4632.82%467.3014546
Isabela Total1,593,5661,489,6451.29%12,414.931281,055

Economy

According to the Bureau of Local Government Finance, the annual regular revenue of Isabela for the fiscal year of 2016 was ₱2,637,950,546.97.

details
Fiscal YearAnnual Regular IncomeChange
20091,393,109,090.76–
20101,498,735,350.477.58%
20111,730,610,652.4215.47%
20121,632,559,738.90-5.67%
20131,772,857,201.768.59%
20142,019,452,462.1413.91%
20152,303,660,681.4814.07%
20162,637,950,546.9714.51%

End notes:

  • Annual Regular Income = Locally Sourced Revenue + Internal Revenue Allotment (IRA) Current Year + Other Shares from National Tax Collection
  • Locally Sourced Revenue = Real Property Tax (General Fund) + Tax on Business + Other Taxes + Regulatory Fees + Service/User Charges + Receipts from Economic Enterprises

Demographics

Population by age group

According to the 2015 Census, the age group with the highest population in Isabela is 5 to 9, with 164,851 individuals. Conversely, the age group with the lowest population is 80 and over, with 12,738 individuals.

details
Age groupPopulation (2015)
Under 132,033
1 to 4133,997
5 to 9164,851
10 to 14154,398
15 to 19150,859
20 to 24149,721
25 to 29131,837
30 to 34115,086
35 to 39110,024
40 to 4496,304
45 to 4988,492
50 to 5477,259
55 to 5963,125
60 to 6447,389
65 to 6931,510
70 to 7419,387
75 to 7914,556
80 and over12,738
Total1,593,566

Historical population

The population of Isabela grew from 442,062 in 1960 to 1,593,566 in 2015, an increase of 1,151,504 people. The latest census figures in 2015 denote a positive growth rate of 1.29%, or an increase of 103,921 people, from the previous population of 1,489,645 in 2010.

details
Census datePopulationGrowth rate
76,431–
112,9602.50%
219,8643.39%
264,4951.91%
442,0624.62%
648,1233.81%
730,3862.43%
870,6043.57%
1,080,3412.18%
1,160,7211.35%
1,287,5752.25%
1,401,4951.18%
1,489,6452.25%
1,593,5661.29%

National roads

As of December 2016, the National Roads in Isabela as classified by the Department of Public Works and Highways are:

Primary Roads

  • Cauayan-Cabatuan Road
  • Daang Maharlika (LZ)
  • Santiago-Tuguegarao By-Pass Road
  • Santiago-Tuguegarao Road

Secondary Roads

  • Cabagan-Santa Maria Road
  • Cordon-Diffun Road
  • Junction National-Potia Road

Tertiary Roads

  • Abbut-Agbannawag Road
  • Alicia-San Mateo Road
  • Burgos-Gen. Aguinaldo (NIA) Road
  • Calamagui-Ilagan Road
  • Cauayan-Poblacion Road
  • Echague-Poblacion Road
  • Gamu-Roxas Road
  • Ilagan-Bigao-Palanan Road
  • Ilagan-Delfin Albano-Mallig Road
  • Junction Delfin Albano Road
  • Junction Ipil-Quirino Boundary Road
  • Junction National-Calamagui Road
  • Junction National-Santa Victoria Road
  • Naguilian-San Mariano Road
  • Old CVR-Cabagan Road
  • Old CVR-San Pablo Road
  • Santiago-Baluarte-Quirino Boundary

National rankings

  • Population (2015): 1,593,566, ranked 15 out of 81
  • Land area (2007): 4,793.43 square kilometers, ranked 3 out of 81
  • Population density (2015): 128 inhabitants per square kilometer, ranked 61 out of 81
  • Annual population growth rate (2010 to 2015): 1.29%, ranked 44 out of 81

Notes

  1. Unless otherwise specified, population count (excluding percentages) and land area figures are derived from the Philippine Statistics Authority.
  2. Maps utilize OpenStreetMap data available under the Open Data Commons Open Database License.
  3. Data on annual regular income is from the Bureau of Local Government Finance, Department of Finance
  4. Data on National Roads is from the Department of Public Works and Highways.
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