Ilocos Region (Region I)

Summary data
Map of the Philippines highlighting Ilocos Region
Typeregion
Island groupLuzon
Provinces4
Cities9
Municipalities116
Barangays3,265
Coastal/Landlockedcoastal
Marine waterbodiesSouth China Sea
Population (2015)5,026,128

The Ilocos Region, officially designated as Region I, is an administrative region in the Philippines occupying the northwestern section of Luzon. It covers 4 provinces, namely, Ilocos Norte, Ilocos Sur, La Union, and Pangasinan. The regional center is the City of San Fernando.

Its population as determined by the 2015 Census was 5,026,128. This represented 8.75% of the overall population of the Luzon island group, or 4.98% of the entire population of the Philippines.

Map

Ilocos Region is bordered, clockwise from the Northeast, by the Cagayan Valley, Cordillera Administrative Region, Central Luzon, and the South China Sea.

details
Map of Ilocos RegionMap of Ilocos Region highlighting its regional center, component provinces and their capitals, and nearby major citiesIlocos NorteIlocos SurLa UnionPangasinanSan Fernando, the regional center

Local government units

Ilocos Region has 4 provinces, 116 municipalities, and 9 cities. The total number of barangays in the region is 3,265.

details
NameTypePopulation (2015)Population (2010)Annual Population Growth Rate (2010‑2015)Area (2007), in km2Density (2015), per km2City countMun countBrgy count
Ilocos Norteprovince593,081568,0170.83%3,467.89171221557
Ilocos Surprovince689,668658,5870.88%2,596.00266232768
La Unionprovince786,653741,9061.12%1,497.70525119576
Pangasinanprovince2,956,7262,779,8621.18%5,451.015424441,364
Ilocos Region Total5,026,1284,748,3721.09%no datano data91163,265

Demographics

Population by age group

According to the 2015 Census, the age group with the highest population in Ilocos Region is 5 to 9, with 510,858 individuals. Conversely, the age group with the lowest population is 75 to 79, with 61,471 individuals.

details
Age groupPopulation (2015)
Under 196,663
1 to 4405,449
5 to 9510,858
10 to 14502,318
15 to 19474,530
20 to 24438,415
25 to 29391,660
30 to 34365,782
35 to 39336,500
40 to 44295,564
45 to 49276,698
50 to 54237,159
55 to 59201,337
60 to 64159,163
65 to 69123,030
70 to 7482,362
75 to 7961,471
80 and over67,169
Total5,026,128

Historical population

The population of Ilocos Region grew from 2,042,865 in 1960 to 5,026,128 in 2015, an increase of 2,983,263 people. The latest census figures in 2015 denote a positive growth rate of 1.09%, or an increase of 277,756 people, from the previous population of 4,748,372 in 2010.

details
Census datePopulationGrowth rate
948,935
1,210,9091.55%
1,459,2940.94%
1,685,5641.49%
2,042,8651.70%
2,488,3911.95%
2,726,2201.85%
2,922,8921.40%
3,550,6421.96%
3,803,8901.30%
4,200,4782.15%
4,546,7891.10%
4,748,3721.59%
5,026,1281.09%

National rankings

  • Population (2015): 5,026,128, ranked 7 out of 17
  • Annual population growth rate (2010 to 2015): 1.09%, ranked 17 out of 17

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.
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