Oas, Province of Albay

Summary data
Typemunicipality
Island groupLuzon
RegionBicol Region (Region V)
ProvinceAlbay
Barangay count53
Postal code4504
Coastal/Landlockedcoastal
Marine waterbodiesBurias Pass
Philippine major island(s)Luzon
Area (2013)263.61 km2 (101.78 sq mi)
Population (2020)66,084
Density (2020)251 / km2 (649 / sq mi)
Coordinates13° 15' North, 123° 30' East (13.2575, 123.5002)
Estimated elevation above sea level34.8 meters (114.1 feet)

Oas is a coastal municipality in the province of Albay.

The municipality has a land area of 263.61 square kilometers or 101.78 square miles which constitutes 10.24% of Albay's total area. Its population as determined by the 2020 Census was 66,084. This represented 4.81% of the total population of Albay province, or 1.09% of the overall population of the Bicol Region. Based on these figures, the population density is computed at 251 inhabitants per square kilometer or 649 inhabitants per square mile.

Barangays

Oas has 53 barangays as shown in the following table.

Demographic profile of barangays
Local government units of Oas
BarangayPopulation percentage (2020)Population (2020)Population (2015)Change (2015‑2020)Annual Population Growth Rate (2015‑2020)
Badbad0.87%577602-4.15%-0.89%
Badian4.40%2,9062,6818.39%1.71%
Bagsa1.32%8758621.51%0.32%
Bagumbayan1.45%9608799.22%1.87%
Balogo5.89%3,8924,236-8.12%-1.77%
Banao0.74%4884703.83%0.79%
Bangiawon1.31%864910-5.05%-1.09%
Bogtong0.67%44036719.89%3.89%
Bongoran2.75%1,8171,8160.06%0.01%
Busac3.18%2,0992,0790.96%0.20%
Cadawag0.49%322485-33.61%-8.26%
Cagmanaba4.60%3,0433,305-7.93%-1.72%
Calaguimit1.36%8968673.34%0.69%
Calpi1.89%1,2491,335-6.44%-1.39%
Calzada1.38%910911-0.11%-0.02%
Camagong2.11%1,3961,16719.62%3.84%
Casinagan0.91%602617-2.43%-0.52%
Centro Poblacion0.33%221225-1.78%-0.38%
Coliat1.25%82772314.38%2.87%
Del Rosario1.04%687733-6.28%-1.35%
Gumabao1.39%91979315.89%3.15%
Ilaor Norte2.23%1,4751,495-1.34%-0.28%
Ilaor Sur2.69%1,7782,202-19.26%-4.40%
Iraya Norte2.53%1,6751,982-15.49%-3.48%
Iraya Sur0.91%600774-22.48%-5.22%
Manga3.14%2,0782,322-10.51%-2.31%
Maporong1.85%1,2231,1843.29%0.68%
Maramba4.44%2,9353,301-11.09%-2.44%
Matambo0.73%484489-1.02%-0.22%
Mayag0.68%451452-0.22%-0.05%
Mayao2.50%1,6531,6182.16%0.45%
Moroponros0.44%294357-17.65%-4.00%
Nagas2.47%1,6331,6310.12%0.03%
Obaliw-Rinas2.25%1,4881,504-1.06%-0.22%
Pistola1.91%1,2591,13510.93%2.21%
Ramay1.08%714734-2.72%-0.58%
Rizal1.37%9038644.51%0.93%
Saban2.93%1,9341,9081.36%0.29%
San Agustin1.80%1,1871,285-7.63%-1.66%
San Antonio1.53%1,0109397.56%1.55%
San Isidro2.30%1,5181,529-0.72%-0.15%
San Jose1.12%738744-0.81%-0.17%
San Juan2.39%1,5781,5034.99%1.03%
San Miguel1.12%738772-4.40%-0.94%
San Pascual1.19%787841-6.42%-1.39%
San Ramon2.78%1,8401,7107.60%1.55%
San Vicente1.27%836938-10.87%-2.39%
Tablon1.26%831940-11.60%-2.56%
Talisay1.12%740779-5.01%-1.08%
Talongog1.79%1,1841,192-0.67%-0.14%
Tapel2.56%1,6941,813-6.56%-1.42%
Tobgon2.33%1,5411,648-6.49%-1.40%
Tobog1.96%1,2951,312-1.30%-0.27%
Oas Total66,08467,960-2.76%-0.59%

Economy

The annual regular revenue of Oas for the fiscal year of 2016 was ₱153,032,324.79.

details
Annual regular income of Oas (2009‑2016)
Fiscal YearAnnual Regular IncomeChange
200986,593,890.71–
201093,274,687.187.72%
2011101,493,274.088.81%
201298,185,895.16-3.26%
2013107,813,089.329.81%
2014122,698,495.0213.81%
2015140,932,377.7214.86%
2016153,032,324.798.59%

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 Oas in the 2015 Census was 67,925 broken down into 14,068 households or an average of 4.83 members per household.

details
Number of households in Oas (1990‑2015)
Census dateHousehold populationNumber of householdsAverage household size
53,0329,6375.50
56,50710,7835.24
62,03511,7155.30
63,83612,4285.14
64,72113,2124.90
67,92514,0684.83

Population by age group

According to the 2015 Census, the age group with the highest population in Oas is 10 to 14, with 8,371 individuals. Conversely, the age group with the lowest population is 80 and over, with 670 individuals.

details
Population of Oas by age group (2015 census)
Age groupPopulation (2015)Age group percentage
Under 11,4522.14%
1 to 46,1849.10%
5 to 98,12811.96%
10 to 148,37112.32%
15 to 197,54411.10%
20 to 245,8718.64%
25 to 294,6146.79%
30 to 343,9185.77%
35 to 393,8215.62%
40 to 443,4025.01%
45 to 493,4615.09%
50 to 542,8914.25%
55 to 592,3603.47%
60 to 641,9742.90%
65 to 691,4762.17%
70 to 741,0851.60%
75 to 797381.09%
80 and over6700.99%
Total67,960100.00%
  • Youth Dependency Ratio: 60.56
  • Old Age Dependency Ratio: 9.96
  • Total Dependency Ratio: 70.52
  • Median Age: 21.96

Historical population

The population of Oas grew from 11,393 in 1903 to 66,084 in 2020, an increase of 54,691 people over the course of 117 years. The latest census figures in 2020 denote a negative growth rate of 0.59%, or a decrease of 1,876 people, from the previous population of 67,960 in 2015.

details
Population of Oas (1903‑2020)
Census datePopulationGrowth rate
11,393–
16,4882.36%
23,1311.71%
27,8241.91%
36,0952.31%
47,9522.82%
50,2930.96%
52,2690.77%
53,0610.15%
56,5361.20%
62,0632.02%
63,8880.40%
64,7850.51%
67,9600.92%
66,084-0.59%

The total number of registered voters or electorate in Oas for the year 2019 was 40,098, broken down into 19,573 males and 20,525 females.

Location

The municipal center of Oas is situated at approximately 13° 15' North, 123° 30' East, in the island of Luzon. Elevation at these coordinates is estimated at 34.8 meters or 114.1 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 Oas are Ligao, Albay, Iriga, Camarines Sur, Tabaco, Albay, Legazpi, Albay, Naga, Camarines Sur, and Sorsogon City, Sorsogon. The nearest municipalities are Polangui, Albay, Libon, Albay, Guinobatan, Albay, Bato, Camarines Sur, Camalig, Albay, and Buhi, Camarines Sur. Its distance from the national capital is 309.73 kilometers (192.46 miles). The following list delineates such distance measurements.

great-circle distance

Nearest towns

Nearest cities

  • Ligao, Albay, 4.41 kilometers (2.74 miles) to the East‑Southeast (S66°E)
  • Iriga, Camarines Sur, 20.53 kilometers (12.76 miles) to the North‑Northwest (N27°W)
  • Tabaco, Albay, 27.30 kilometers (16.97 miles) to the East‑Northeast (N66°E)
  • Legazpi, Albay, 28.57 kilometers (17.75 miles) to the East‑Southeast (S63°E)
  • Naga, Camarines Sur, 52.94 kilometers (32.90 miles) to the Northwest (N40°W)
  • Sorsogon City, Sorsogon, 63.29 kilometers (39.33 miles) to the East‑Southeast (S60°E)

Distance from Manila: 309.73 kilometers (192.46 miles) to the West‑Northwest (N61°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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