Embedded Files
Type
Island group
Provinces
4
Cities
9
Municipalities
116
Barangays
3,267
Coastal/Landlocked
coastal
Marine waterbodies
South China Sea
Area (2013)
129.65 km2 (5005.67 sq mi)
Population (2020)
5,301,139
Density (2020)
409 / km2 (1,059 / sq mi)
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 2020 Census was 5,301,139. This represented 8.52% of the overall population of the Luzon island group, or 4.86% of the entire population of the Philippines. Based on these figures, the population density is computed at 409 inhabitants per square kilometer or 1,059 inhabitants per square mile.
Map
Map
Ilocos Region is bordered, clockwise from the Northeast, by the Cagayan Valley, Cordillera Administrative Region, Central Luzon, and the South China Sea.
details
Local government units
Local government units
Ilocos Region has 4 provinces, 116 municipalities, and 9 cities. The total number of barangays in the region is 3,267.
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Filter:
Name
Type
Population (2020)
Population (2015)
Annual Population Growth Rate (2015‑2020)
Area (2013), in km2
Density (2020), per km2
City count
Mun count
Brgy count
province
609,588
593,081
0.58%
3,418.75
178
2
21
559
province
706,009
689,668
0.49%
2,596.00
272
2
32
768
province
822,352
786,653
0.94%
1,499.28
548
1
19
576
province
3,163,190
2,956,726
1.43%
5,450.59
580
4
44
1,364
Ilocos Region Total
5,301,139
5,026,128
1.13%
12,964.62
409
9
116
3,267
Population (2020)Population (2015)Area (2013)Barangay count (2021)
Click on or hover over the bars to see the associated data of each LGU.
Demographics
Demographics
Population by age group
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.
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Combining age groups together, those aged 14 and below, consisting of the young dependent population which include infants/babies, children and young adolescents/teenagers, make up an aggregate of 30.15% (1,515,288). Those aged 15 up to 64, roughly, the economically active population and actual or potential members of the work force, constitute a total of 63.21% (3,176,808). Finally, old dependent population consisting of the senior citizens, those aged 65 and over, total 6.65% (334,032) in all.
The computed Age Dependency Ratios mean that among the population of Ilocos Region (Region I), there are 48 youth dependents to every 100 of the working age population; there are 11 aged/senior citizens to every 100 of the working population; and overall, there are 58 dependents (young and old-age) to every 100 of the working population.
The median age of 26 indicates that half of the entire population of Ilocos Region (Region I) are aged less than 26 and the other half are over the age of 26.
Age group
Population (2015)
Age group percentage
Under 1
96,663
1.92%
1 to 4
405,449
8.07%
5 to 9
510,858
10.16%
10 to 14
502,318
9.99%
15 to 19
474,530
9.44%
20 to 24
438,415
8.72%
25 to 29
391,660
7.79%
30 to 34
365,782
7.28%
35 to 39
336,500
6.70%
40 to 44
295,564
5.88%
45 to 49
276,698
5.51%
50 to 54
237,159
4.72%
55 to 59
201,337
4.01%
60 to 64
159,163
3.17%
65 to 69
123,030
2.45%
70 to 74
82,362
1.64%
75 to 79
61,471
1.22%
80 and over
67,169
1.34%
Total
5,026,128
100.00%
Youth Dependency Ratio: 47.7
Old Age Dependency Ratio: 10.51
Total Dependency Ratio: 58.21
Median Age: 26.08
Click on or hover over the bars to see the population of each age group.
Individual age groupsAggregate age groups
Historical population
Historical population
The population of Ilocos Region grew from 948,935 in 1903 to 5,301,139 in 2020, an increase of 4,352,204 people over the course of 117 years. The latest census figures in 2020 denote a positive growth rate of 1.13%, or an increase of 275,011 people, from the previous population of 5,026,128 in 2015.
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Census date
Population
Growth rate
1903 Mar 2
948,935
–
1918 Dec 31
1,210,909
1.55%
1939 Jan 1
1,459,294
0.94%
1948 Oct 1
1,685,564
1.49%
1960 Feb 15
2,042,865
1.70%
1970 May 6
2,488,391
1.95%
1975 May 1
2,726,220
1.85%
1980 May 1
2,922,892
1.40%
1990 May 1
3,550,642
1.96%
1995 Sep 1
3,803,890
1.30%
2000 May 1
4,200,478
2.15%
2007 Aug 1
4,546,789
1.10%
2010 May 1
4,748,372
1.59%
2015 Aug 1
5,026,128
1.09%
2020 May 1
5,301,139
1.13%
PopulationGrowth Rate
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Bar
The total number of registered voters or electorate in Ilocos Region for the year 2019 was 3,331,404.
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