Gamu, Province of Isabela

Summary data
Typemunicipality
Island groupLuzon
RegionCagayan Valley (Region II)
ProvinceIsabela
Barangay count16
Postal code3301
Coastal/Landlockedlandlocked
Marine waterbodiesnone (landlocked)
Philippine major island(s)Luzon
Area (2013)129.40 km2 (49.96 sq mi)
Population (2020)30,655
Density (2020)237 / km2 (614 / sq mi)
Coordinates17° 3' North, 121° 50' East (17.0472, 121.8333)
Estimated elevation above sea level51.9 meters (170.2 feet)

Gamu is a landlocked municipality in the coastal province of Isabela.

The municipality has a land area of 129.40 square kilometers or 49.96 square miles which constitutes 0.99% of Isabela's total area. Its population as determined by the 2020 Census was 30,655. This represented 1.81% of the total population of Isabela province, or 0.83% of the overall population of the Cagayan Valley region. Based on these figures, the population density is computed at 237 inhabitants per square kilometer or 614 inhabitants per square mile.

Barangays

Gamu has 16 barangays as shown in the following table.

Demographic profile of barangays
Local government units of Gamu
BarangayPopulation percentage (2020)Population (2020)Population (2015)Change (2015‑2020)Annual Population Growth Rate (2015‑2020)
Barcolan3.38%1,03794010.32%2.09%
Buenavista3.14%964999-3.50%-0.75%
Dammao1.94%594623-4.65%-1.00%
District I3.15%965969-0.41%-0.09%
District II7.18%2,2011,98410.94%2.21%
District III8.72%2,6742,704-1.11%-0.23%
Furao8.28%2,5382,5220.63%0.13%
Guibang9.83%3,0142,8027.57%1.55%
Lenzon3.61%1,1061,00110.49%2.12%
Linglingay4.40%1,3481,3450.22%0.05%
Mabini14.78%4,5304,608-1.69%-0.36%
Pintor4.60%1,4091,3663.15%0.65%
Rizal1.01%311366-15.03%-3.37%
Songsong5.22%1,5991,5145.61%1.16%
Union3.93%1,2041,06513.05%2.62%
Upi16.84%5,1615,0961.28%0.27%
Gamu Total30,65529,9042.51%0.52%

Economy

The annual regular revenue of Gamu for the fiscal year of 2016 was 92,008,460.47.

details
Annual regular income of Gamu (2009‑2016)
Fiscal YearAnnual Regular IncomeChange
200912,631,630.39
201080,258,881.14535.38%
2011
2012
201358,151,806.90
201465,982,004.5913.47%
201575,070,967.9813.77%
201692,008,460.4722.56%

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 Gamu in the 2015 Census was 29,868 broken down into 6,791 households or an average of 4.40 members per household.

details
Number of households in Gamu (1990‑2015)
Census dateHousehold populationNumber of householdsAverage household size
19,1283,7415.11
22,6554,6024.92
25,8605,1695.00
27,4566,0704.52
28,5316,4774.40
29,8686,7914.40

Population by age group

According to the 2015 Census, the age group with the highest population in Gamu is 5 to 9, with 3,131 individuals. Conversely, the age group with the lowest population is 80 and over, with 261 individuals.

details
Population of Gamu by age group (2015 census)
Age groupPopulation (2015)Age group percentage
Under 16002.01%
1 to 42,4928.33%
5 to 93,13110.47%
10 to 142,9269.78%
15 to 192,7729.27%
20 to 242,7399.16%
25 to 292,3267.78%
30 to 342,0286.78%
35 to 392,0686.92%
40 to 441,8666.24%
45 to 491,6865.64%
50 to 541,5655.23%
55 to 591,2334.12%
60 to 649073.03%
65 to 696292.10%
70 to 743951.32%
75 to 792800.94%
80 and over2610.87%
Total29,904100.00%
  • Youth Dependency Ratio: 47.68
  • Old Age Dependency Ratio: 8.16
  • Total Dependency Ratio: 55.84
  • Median Age: 25.63

Historical population

The population of Gamu grew from 3,581 in 1903 to 30,655 in 2020, an increase of 27,074 people over the course of 117 years. The latest census figures in 2020 denote a positive growth rate of 0.52%, or an increase of 751 people, from the previous population of 29,904 in 2015.

details
Population of Gamu (1903‑2020)
Census datePopulationGrowth rate
3,581
6,0963.42%
18,2015.62%
11,744-4.40%
18,7624.21%
12,586-3.83%
13,6351.62%
16,9224.41%
19,1411.24%
22,7653.30%
25,9012.81%
27,4790.82%
28,6571.54%
29,9040.81%
30,6550.52%

The total number of registered voters or electorate in Gamu for the year 2019 was 19,382, broken down into 9,619 males and 9,763 females.

Location

The municipal center of Gamu is situated at approximately 17° 3' North, 121° 50' East, in the island of Luzon. Elevation at these coordinates is estimated at 51.9 meters or 170.2 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 Gamu are Ilagan, Isabela, Cauayan, Isabela, Santiago, Isabela, Tabuk, Kalinga, Tuguegarao, Cagayan, and Candon, Ilocos Sur. The nearest municipalities are Naguilian, Isabela, Reina Mercedes, Isabela, Luna, Isabela, Quirino, Isabela, Burgos, Isabela, and Benito Soliven, Isabela. Its distance from the national capital is 286.80 kilometers (178.21 miles). The following list delineates such distance measurements.

great-circle distance

Nearest towns

Nearest cities

Distance from Manila: 286.80 kilometers (178.21 miles) to the South‑Southwest (S19°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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