Santiago, Province of Ilocos Sur

Summary data
Typemunicipality
Island groupLuzon
RegionIlocos Region (Region I)
ProvinceIlocos Sur
Barangay count24
Postal code2707
Coastal/Landlockedcoastal
Marine waterbodiesSouth China Sea
Philippine major island(s)Luzon
Area (2013)46.36 km2 (17.90 sq mi)
Population (2020)19,471
Density (2020)420 / km2 (1,088 / sq mi)
Coordinates17° 18' North, 120° 27' East (17.2940, 120.4453)
Estimated elevation above sea level13.7 meters (44.9 feet)

Santiago is a coastal municipality in the province of Ilocos Sur.

The municipality has a land area of 46.36 square kilometers or 17.90 square miles which constitutes 1.79% of Ilocos Sur's total area. Its population as determined by the 2020 Census was 19,471. This represented 2.76% of the total population of Ilocos Sur province, or 0.37% of the overall population of the Ilocos Region. Based on these figures, the population density is computed at 420 inhabitants per square kilometer or 1,088 inhabitants per square mile.

Barangays

Santiago has 24 barangays as shown in the following table.

Demographic profile of barangays
Local government units of Santiago
BarangayPopulation percentage (2020)Population (2020)Population (2015)Change (2015‑2020)Annual Population Growth Rate (2015‑2020)
Al-aludig4.47%871872-0.11%-0.02%
Ambucao8.80%1,7131,7090.23%0.05%
Baybayabas3.15%6145668.48%1.73%
Bigbiga3.28%638655-2.60%-0.55%
Bulbulala3.13%61054811.31%2.28%
Busel-busel2.72%5304937.51%1.53%
Butol5.66%1,10399810.52%2.13%
Caburao7.15%1,3921,3711.53%0.32%
Dan-ar10.30%2,0061,9353.67%0.76%
Gabao4.60%89681310.21%2.07%
Guinabang1.55%3023000.67%0.14%
Imus1.59%3092993.34%0.69%
Lang-ayan2.06%4023737.77%1.59%
Mambug6.00%1,1681,200-2.67%-0.57%
Nalasin2.92%568588-3.40%-0.73%
Olo-olo Norte5.06%9869414.78%0.99%
Olo-olo Sur2.32%45240810.78%2.18%
Poblacion Norte2.03%396402-1.49%-0.32%
Poblacion Sur2.54%495496-0.20%-0.04%
Sabangan6.89%1,3411,20311.47%2.31%
Salincub4.46%8688393.46%0.72%
San Jose1.53%2982912.41%0.50%
San Roque4.52%8818395.01%1.03%
Ubbog3.25%6326201.94%0.40%
Santiago Total19,47118,7593.80%0.79%

Economy

The annual regular revenue of Santiago for the fiscal year of 2016 was ₱290,583,630.45.

details
Annual regular income of Santiago (2009‑2016)
Fiscal YearAnnual Regular IncomeChange
200939,022,147.01–
201099,425,064.32154.79%
201194,864,212.60-4.59%
201291,645,967.26-3.39%
201394,876,936.383.53%
201446,190,317.53-51.32%
2015153,785,603.60232.94%
2016290,583,630.4588.95%

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

Households

The household population of Santiago in the 2015 Census was 18,731 broken down into 4,387 households or an average of 4.27 members per household.

details
Number of households in Santiago (1990‑2015)
Census dateHousehold populationNumber of householdsAverage household size
14,4232,6505.44
14,8372,9175.09
15,8673,2334.91
16,8013,8014.42
17,9584,1214.36
18,7314,3874.27

Population by age group

According to the 2015 Census, the age group with the highest population in Santiago is 5 to 9, with 1,875 individuals. Conversely, the age group with the lowest population is 75 to 79, with 296 individuals.

details
Population of Santiago by age group (2015 census)
Age groupPopulation (2015)Age group percentage
Under 13741.99%
1 to 41,4497.72%
5 to 91,87510.00%
10 to 141,6788.95%
15 to 191,4567.76%
20 to 241,5788.41%
25 to 291,3547.22%
30 to 341,4347.64%
35 to 391,3537.21%
40 to 441,1195.97%
45 to 491,1135.93%
50 to 549635.13%
55 to 598284.41%
60 to 646703.57%
65 to 694982.65%
70 to 743731.99%
75 to 792961.58%
80 and over3481.86%
Total18,759100.00%
  • Youth Dependency Ratio: 45.3
  • Old Age Dependency Ratio: 12.77
  • Total Dependency Ratio: 58.07
  • Median Age: 28.58

Historical population

The population of Santiago grew from 3,760 in 1903 to 19,471 in 2020, an increase of 15,711 people over the course of 117 years. The latest census figures in 2020 denote a positive growth rate of 0.79%, or an increase of 712 people, from the previous population of 18,759 in 2015.

details
Population of Santiago (1903‑2020)
Census datePopulationGrowth rate
3,760–
5,4292.35%
6,0170.52%
6,6100.97%
8,2131.93%
10,2242.17%
11,2451.93%
11,8431.04%
14,4271.99%
14,8430.53%
15,8761.45%
16,8060.79%
17,9582.44%
18,7590.83%
19,4710.79%

The total number of registered voters or electorate in Santiago for the year 2019 was 12,705, broken down into 6,352 males and 6,353 females.

Location

The municipal center of Santiago is situated at approximately 17° 18' North, 120° 27' East, in the island of Luzon. Elevation at these coordinates is estimated at 13.7 meters or 44.9 feet above mean sea level.

Distances

Based on the great-circle distance (the shortest distance between two points over the surface of the Earth), the cities closest to Santiago are Candon, Ilocos Sur, Vigan, Ilocos Sur, San Fernando, La Union, Batac, Ilocos Norte, Baguio, and Laoag, Ilocos Norte. The nearest municipalities are San Esteban, Ilocos Sur, Burgos, Ilocos Sur, Banayoyo, Ilocos Sur, Santa Maria, Ilocos Sur, Lidlidda, Ilocos Sur, and Galimuyod, Ilocos Sur. Its distance from the national capital is 304.58 kilometers (189.26 miles). The following list delineates such distance measurements.

great-circle distance

Nearest towns

Nearest cities

Distance from Manila: 304.58 kilometers (189.26 miles) to the South (S11°E)

Notes

  1. Unless otherwise specified, population count (excluding percentages), household data, and land area figures are derived from the Philippine Statistics Authority.
  2. Data on registered voters is from the Commission on Elections.
  3. Data on annual regular income is from the Bureau of Local Government Finance, Department of Finance
  4. Postal code information is from the Philippine Postal Corporation.
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