Siay, Province of Zamboanga Sibugay

Summary data
Typemunicipality
Island groupMindanao
RegionZamboanga Peninsula (Region IX)
ProvinceZamboanga Sibugay
Barangay count29
Postal code7006
Coastal/Landlockedcoastal
Marine waterbodiesSibuguey Bay [Moro Gulf, Celebes Sea]
Philippine major island(s)Mindanao
Area (2007)313.66 km2 (121.10 sq mi)
Population (2015)41,572
Density (2015)133 / km2 (343 / sq mi)
Coordinates7° 42' North, 122° 52' East (7.7062, 122.8643)
Estimated elevation above sea level29.1 meters (95.5 feet)

Siay is a coastal municipality in the province of Zamboanga Sibugay.

The municipality has a land area of 313.66 square kilometers or 121.10 square miles which constitutes 8.69% of Zamboanga Sibugay's total area. Its population as determined by the 2015 Census was 41,572. This represented 6.57% of the total population of Zamboanga Sibugay province, or 1.15% of the overall population of the Zamboanga Peninsula region. Based on these figures, the population density is computed at 133 inhabitants per square kilometer or 343 inhabitants per square mile.

Barangays

Siay has 29 barangays as shown in the following table.

Demographic profile of barangays
BarangayPopulation percentage (2015)Population (2015)Population (2010)Change (2010‑2015)Annual Population Growth Rate (2010‑2015)
Bagong Silang1.09%4544178.87%1.63%
Balagon7.86%3,2693,1613.42%0.64%
Balingasan1.81%75362021.45%3.77%
Balucanan3.92%1,6301,39716.68%2.98%
Bataan3.32%1,3801,3095.42%1.01%
Batu8.94%3,7182,82031.84%5.40%
Buyogan2.79%1,1581,225-5.47%-1.07%
Camanga2.32%96584514.20%2.56%
Coloran3.93%1,6331,46911.16%2.04%
Kimos2.75%1,1441,01312.93%2.34%
Labasan2.23%9268785.47%1.02%
Lagting2.22%92475522.38%3.92%
Laih2.39%9931,091-8.98%-1.78%
Logpond4.14%1,7231,50114.79%2.66%
Magsaysay1.15%476649-26.66%-5.73%
Mahayahay2.41%1,0019238.45%1.56%
Maligaya3.22%1,3371,2397.91%1.46%
Maniha2.79%1,1601,204-3.65%-0.71%
Minsulao2.29%9541,083-11.91%-2.39%
Mirangan3.29%1,3661,378-0.87%-0.17%
Monching10.20%4,2394,0604.41%0.82%
Paruk3.63%1,5091,3789.51%1.74%
Poblacion6.00%2,4952,13916.64%2.97%
Princesa Sumama0.85%352576-38.89%-8.95%
Salinding4.89%2,0311,66821.76%3.82%
San Isidro1.65%68459215.54%2.79%
Sibuguey2.74%1,13991324.75%4.30%
Siloh4.36%1,8111,60312.98%2.35%
Villagracia0.84%3483237.74%1.43%
Siay Total41,57238,2298.74%1.61%

Economy

According to the Bureau of Local Government Finance, the annual regular revenue of Siay for the fiscal year of 2016 was 123,353,094.76.

details
Fiscal YearAnnual Regular IncomeChange
200968,449,497.67
201070,575,245.183.11%
201177,511,650.349.83%
201273,866,090.93-4.70%
201388,275,449.6519.51%
201497,876,230.5910.88%
2015112,700,148.6715.15%
2016123,353,094.769.45%

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

Population by age group

According to the 2015 Census, the age group with the highest population in Siay is 5 to 9, with 5,075 individuals. Conversely, the age group with the lowest population is 80 and over, with 270 individuals.

details
Age groupPopulation (2015)
Under 1920
1 to 44,097
5 to 95,075
10 to 144,876
15 to 194,448
20 to 243,970
25 to 293,154
30 to 342,544
35 to 392,446
40 to 442,159
45 to 492,131
50 to 541,718
55 to 591,382
60 to 64965
65 to 69690
70 to 74427
75 to 79300
80 and over270
Total41,572

Historical population

The population of Siay grew from 14,088 in 1960 to 41,572 in 2015, an increase of 27,484 people. The latest census figures in 2015 denote a positive growth rate of 1.61%, or an increase of 3,343 people, from the previous population of 38,229 in 2010.

details
Census datePopulationGrowth rate
14,088
32,9228.66%
37,8162.82%
17,004-14.77%
24,6893.80%
29,3033.26%
32,8442.48%
33,9020.44%
38,2294.47%
41,5721.61%

Location

The municipal center of Siay is situated at approximately 7° 42' North, 122° 52' East, in the island of Mindanao. Elevation at these coordinates is estimated at 29.1 meters or 95.5 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 Siay are Pagadian, Tangub, Dipolog, Ozamiz, Dapitan, and Zamboanga City. The nearest municipalities are Imelda, Diplahan, Payao, Kabasalan, Malangas, and Naga. Its distance from the national capital is 788.82 kilometers (490.15 miles). The following list delineates such distance measurements.

great-circle distance

Nearest towns

Nearest cities

Distance from Manila: 788.82 kilometers (490.15 miles) to the North‑Northwest (N15°W)

National rankings

  • Population (2015): 41,572, ranked 577 out of 1,634
  • Land area (2007): 121.10 square kilometers, ranked 276 out of 1,634
  • Population density (2015): 133 inhabitants per square kilometer, ranked 1,145 out of 1,634
  • Annual population growth rate (2010 to 2015): 1.61%, ranked 280 out of 1,634

Notes

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