San Guillermo, Province of Isabela

Summary data
Typemunicipality
Island groupLuzon
RegionCagayan Valley (Region II)
ProvinceIsabela
Barangay count26
Postal code3308
Coastal/Landlockedlandlocked
Marine waterbodiesnone (landlocked)
Philippine major island(s)Luzon
Area (2013)457.35 km2 (176.58 sq mi)
Population (2020)20,915
Density (2020)46 / km2 (118 / sq mi)
Coordinates16° 43' North, 121° 49' East (16.7198, 121.8087)
Estimated elevation above sea level109.1 meters (357.8 feet)

San Guillermo is a landlocked municipality in the coastal province of Isabela.

The municipality has a land area of 457.35 square kilometers or 176.58 square miles which constitutes 3.49% of Isabela's total area. Its population as determined by the 2020 Census was 20,915. This represented 1.23% of the total population of Isabela province, or 0.57% of the overall population of the Cagayan Valley region. Based on these figures, the population density is computed at 46 inhabitants per square kilometer or 118 inhabitants per square mile.

Barangays

San Guillermo has 26 barangays as shown in the following table.

Demographic profile of barangays
Local government units of San Guillermo
BarangayPopulation percentage (2020)Population (2020)Population (2015)Change (2015‑2020)Annual Population Growth Rate (2015‑2020)
Anonang2.46%5144816.86%1.41%
Aringay2.15%450458-1.75%-0.37%
Burgos5.06%1,05891216.01%3.17%
Calaoagan2.14%4474118.76%1.78%
Centro 112.31%2,5752,5182.26%0.47%
Centro 211.33%2,3702,3321.63%0.34%
Colorado5.15%1,0781,130-4.60%-0.99%
Dietban3.63%7607442.15%0.45%
Dingading4.40%920992-7.26%-1.57%
Dipacamo4.35%90982210.58%2.14%
Estrella2.29%4794565.04%1.04%
Guam5.48%1,1471,0598.31%1.69%
Nakar4.73%98976030.13%5.70%
Palawan2.33%4884860.41%0.09%
Progreso2.75%5755750.00%0.00%
Rizal6.89%1,4401,4290.77%0.16%
San Francisco Norte2.41%505514-1.75%-0.37%
San Francisco Sur1.95%4074001.75%0.37%
San Mariano Norte1.27%2662496.83%1.40%
San Mariano Sur2.91%608644-5.59%-1.20%
San Rafael1.02%213228-6.58%-1.42%
Sinalugan3.29%6886574.72%0.98%
Villa Remedios1.47%3082886.94%1.42%
Villa Rose3.80%7957269.50%1.93%
Villa Sanchez2.66%557559-0.36%-0.08%
Villa Teresita1.76%369370-0.27%-0.06%
San Guillermo Total20,91520,2003.54%0.74%

Economy

The annual regular revenue of San Guillermo for the fiscal year of 2016 was 94,288,434.83.

details
Annual regular income of San Guillermo (2009‑2016)
Fiscal YearAnnual Regular IncomeChange
200953,134,122.29
201057,665,384.598.53%
201161,278,072.026.26%
201259,819,840.71-2.38%
201367,530,367.2912.89%
201476,419,145.6413.16%
201586,203,483.0812.80%
201694,288,434.839.38%

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 San Guillermo in the 2015 Census was 20,157 broken down into 4,601 households or an average of 4.38 members per household.

details
Number of households in San Guillermo (1990‑2015)
Census dateHousehold populationNumber of householdsAverage household size
10,6881,9925.37
12,5062,5894.83
13,3262,5495.23
16,8653,6394.63
18,4234,1224.47
20,1574,6014.38

Population by age group

According to the 2015 Census, the age group with the highest population in San Guillermo is 5 to 9, with 2,324 individuals. Conversely, the age groups with the lowest population are in the ranges 75 to 79, and 80 and over, with 144 individuals.

details
Population of San Guillermo by age group (2015 census)
Age groupPopulation (2015)Age group percentage
Under 14502.23%
1 to 41,8399.10%
5 to 92,32411.50%
10 to 142,15810.68%
15 to 192,04410.12%
20 to 241,9189.50%
25 to 291,7198.51%
30 to 341,4607.23%
35 to 391,2866.37%
40 to 441,1595.74%
45 to 491,0355.12%
50 to 548554.23%
55 to 596493.21%
60 to 644542.25%
65 to 693331.65%
70 to 742291.13%
75 to 791440.71%
80 and over1440.71%
Total20,200100.00%
  • Youth Dependency Ratio: 53.83
  • Old Age Dependency Ratio: 6.76
  • Total Dependency Ratio: 60.59
  • Median Age: 23.35

Historical population

The population of San Guillermo grew from 9,970 in 1970 to 20,915 in 2020, an increase of 10,945 people over the course of 50 years. The latest census figures in 2020 denote a positive growth rate of 0.73%, or an increase of 715 people, from the previous population of 20,200 in 2015.

details
Population of San Guillermo (1903‑2020)
Census datePopulationGrowth rate
9,970
5,573-11.02%
6,9854.62%
10,7004.36%
12,5062.96%
13,3381.39%
16,8653.29%
18,4233.27%
20,2001.77%
20,9150.73%

The total number of registered voters or electorate in San Guillermo for the year 2019 was 12,337, broken down into 6,440 males and 5,897 females.

Location

The municipal center of San Guillermo is situated at approximately 16° 43' North, 121° 49' East, in the island of Luzon. Elevation at these coordinates is estimated at 109.1 meters or 357.8 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 San Guillermo are Cauayan, Isabela, Santiago, Isabela, Ilagan, Isabela, Tabuk, Kalinga, Tuguegarao, Cagayan, and San Jose, Nueva Ecija. The nearest municipalities are Angadanan, Isabela, Alicia, Isabela, Echague, Isabela, San Isidro, Isabela, Jones, Isabela, and San Agustin, Isabela. Its distance from the national capital is 251.81 kilometers (156.46 miles). The following list delineates such distance measurements.

great-circle distance

Nearest towns

Nearest cities

Distance from Manila: 251.81 kilometers (156.46 miles) to the South‑Southwest (S21°W)

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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