San Isidro, Province of Abra

Summary data
Typemunicipality
Island groupLuzon
RegionCordillera Administrative Region (CAR)
ProvinceAbra
Barangay count9
Postal code2809
Coastal/Landlockedlandlocked
Marine waterbodiesnone (landlocked)
Philippine major island(s)Luzon
Area (2013)48.07 km2 (18.56 sq mi)
Population (2020)4,745
Density (2020)99 / km2 (256 / sq mi)
Coordinates17° 28' North, 120° 36' East (17.4656, 120.6017)
Estimated elevation above sea level143.0 meters (469.0 feet)

San Isidro is a municipality in the landlocked province of Abra.

The municipality has a land area of 48.07 square kilometers or 18.56 square miles which constitutes 1.14% of Abra's total area. Its population as determined by the 2020 Census was 4,745. This represented 1.89% of the total population of Abra province, or 0.26% of the overall population of the Cordillera Administrative Region. Based on these figures, the population density is computed at 99 inhabitants per square kilometer or 256 inhabitants per square mile.

Barangays

San Isidro has 9 barangays as shown in the following table.

Demographic profile of barangays
Local government units of San Isidro
BarangayPopulation percentage (2020)Population (2020)Population (2015)Change (2015‑2020)Annual Population Growth Rate (2015‑2020)
Cabayogan7.21%34230412.50%2.51%
Dalimag14.39%683687-0.58%-0.12%
Langbaban8.39%39834714.70%2.93%
Manayday12.48%5925811.89%0.40%
Pantoc9.93%47142510.82%2.19%
Poblacion12.77%606634-4.42%-0.95%
Sabtan-olo7.78%3693379.50%1.93%
San Marcial13.13%6236190.65%0.14%
Tangbao13.93%6616403.28%0.68%
San Isidro Total4,7454,5743.74%0.78%

Economy

The annual regular revenue of San Isidro for the fiscal year of 2016 was 158,455,186.02.

details
Annual regular income of San Isidro (2009‑2016)
Fiscal YearAnnual Regular IncomeChange
200924,632,714.60
201059,370,070.90141.02%
201155,165,397.21-7.08%
201238,853,635.63-29.57%
201341,981,595.108.05%
201430,283,389.14-27.87%
201583,308,082.53175.09%
2016158,455,186.0290.20%

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 Isidro in the 2015 Census was 4,573 broken down into 1,082 households or an average of 4.23 members per household.

details
Number of households in San Isidro (1990‑2015)
Census dateHousehold populationNumber of householdsAverage household size
3,7406755.54
3,8387395.19
4,2918205.23
4,6469474.91
4,8871,0384.71
4,5731,0824.23

Population by age group

According to the 2015 Census, the age group with the highest population in San Isidro is 10 to 14, with 521 individuals. Conversely, the age group with the lowest population is 70 to 74, with 69 individuals.

details
Population of San Isidro by age group (2015 census)
Age groupPopulation (2015)Age group percentage
Under 1901.97%
1 to 43487.61%
5 to 950311.00%
10 to 1452111.39%
15 to 193868.44%
20 to 243427.48%
25 to 293257.11%
30 to 343006.56%
35 to 392846.21%
40 to 442355.14%
45 to 492625.73%
50 to 542685.86%
55 to 591894.13%
60 to 641483.24%
65 to 691202.62%
70 to 74691.51%
75 to 79801.75%
80 and over1042.27%
Total4,574100.00%
  • Youth Dependency Ratio: 53.38
  • Old Age Dependency Ratio: 13.62
  • Total Dependency Ratio: 67
  • Median Age: 26.49

Historical population

The population of San Isidro grew from 2,605 in 1960 to 4,745 in 2020, an increase of 2,140 people over the course of 60 years. The latest census figures in 2020 denote a positive growth rate of 0.78%, or an increase of 171 people, from the previous population of 4,574 in 2015.

details
Population of San Isidro (1903‑2020)
Census datePopulationGrowth rate
2,605
3,0981.71%
2,924-1.15%
3,0871.09%
3,7441.95%
3,8420.49%
4,2932.41%
4,6471.10%
4,8881.86%
4,574-1.26%
4,7450.78%

The total number of registered voters or electorate in San Isidro for the year 2019 was 3,326, broken down into 1,704 males and 1,622 females.

Location

The municipal center of San Isidro is situated at approximately 17° 28' North, 120° 36' East, in the island of Luzon. Elevation at these coordinates is estimated at 143.0 meters or 469.0 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 Isidro are Vigan, Ilocos Sur, Candon, Ilocos Sur, Batac, Ilocos Norte, Laoag, Ilocos Norte, Tabuk, Kalinga, and San Fernando, La Union. The nearest municipalities are Villaviciosa, Abra, Pilar, Abra, Nagbukel, Ilocos Sur, Pidigan, Abra, Manabo, Abra, and Peñarrubia, Abra. Its distance from the national capital is 320.71 kilometers (199.28 miles). The following list delineates such distance measurements.

great-circle distance

Nearest towns

  • Villaviciosa, Abra, 3.96 kilometers (2.46 miles) to the Southeast (S39°E)
  • Pilar, Abra, 5.44 kilometers (3.38 miles) to the South (S7°W)
  • Nagbukel, Ilocos Sur, 8.31 kilometers (5.16 miles) to the West‑Southwest (S75°W)
  • Pidigan, Abra, 11.66 kilometers (7.25 miles) to the North (N6°W)
  • Manabo, Abra, 11.53 kilometers (7.16 miles) to the East‑Southeast (S72°E)
  • Peñarrubia, Abra, 12.16 kilometers (7.56 miles) to the North‑Northeast (N26°E)

Nearest cities

Distance from Manila: 320.71 kilometers (199.28 miles) to the South (S7°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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