Siay, Province of Zamboanga Sibugay
| Type | municipality |
|---|---|
| Island group | Mindanao |
| Region | Zamboanga Peninsula (Region IX) |
| Province | Zamboanga Sibugay |
| Barangay count | 29 |
| Postal code | 7006 |
| Coastal/Landlocked | coastal |
| Marine waterbodies | Sibuguey Bay [Moro Gulf, Celebes Sea] |
| Philippine major island(s) | Mindanao |
| Area (2013) | 313.66 km2 (121.10 sq mi) |
| Population (2020) | 40,585 |
| Density (2020) | 129 / km2 (335 / sq mi) |
| Coordinates | 7° 42' North, 122° 52' East (7.7062, 122.8643) |
| Estimated elevation above sea level | 29.1 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 9.01% of Zamboanga Sibugay's total area. Its population as determined by the 2020 Census was 40,585. This represented 6.06% of the total population of Zamboanga Sibugay province, or 1.05% of the overall population of the Zamboanga Peninsula region. Based on these figures, the population density is computed at 129 inhabitants per square kilometer or 335 inhabitants per square mile.
Barangays
Siay has 29 barangays as shown in the following table.
Demographic profile of barangays
| Barangay | Population percentage (2020) | Population (2020) | Population (2015) | Change (2015‑2020) | Annual Population Growth Rate (2015‑2020) |
|---|---|---|---|---|---|
| Bagong Silang | 1.57% | 637 | 454 | 40.31% | 7.39% |
| Balagon | 6.89% | 2,798 | 3,269 | -14.41% | -3.22% |
| Balingasan | 1.77% | 717 | 753 | -4.78% | -1.03% |
| Balucanan | 4.47% | 1,813 | 1,630 | 11.23% | 2.26% |
| Bataan | 2.80% | 1,136 | 1,380 | -17.68% | -4.01% |
| Batu | 9.04% | 3,670 | 3,718 | -1.29% | -0.27% |
| Buyogan | 2.88% | 1,170 | 1,158 | 1.04% | 0.22% |
| Camanga | 2.12% | 862 | 965 | -10.67% | -2.35% |
| Coloran | 4.52% | 1,835 | 1,633 | 12.37% | 2.49% |
| Kimos | 3.10% | 1,259 | 1,144 | 10.05% | 2.04% |
| Labasan | 2.41% | 980 | 926 | 5.83% | 1.20% |
| Lagting | 1.88% | 761 | 924 | -17.64% | -4.00% |
| Laih | 2.53% | 1,027 | 993 | 3.42% | 0.71% |
| Logpond | 5.30% | 2,150 | 1,723 | 24.78% | 4.77% |
| Magsaysay | 0.86% | 348 | 476 | -26.89% | -6.38% |
| Mahayahay | 2.05% | 833 | 1,001 | -16.78% | -3.79% |
| Maligaya | 2.22% | 903 | 1,337 | -32.46% | -7.93% |
| Maniha | 2.42% | 984 | 1,160 | -15.17% | -3.40% |
| Minsulao | 2.76% | 1,121 | 954 | 17.51% | 3.45% |
| Mirangan | 3.84% | 1,559 | 1,366 | 14.13% | 2.82% |
| Monching | 10.27% | 4,169 | 4,239 | -1.65% | -0.35% |
| Paruk | 3.65% | 1,483 | 1,509 | -1.72% | -0.37% |
| Poblacion | 5.90% | 2,395 | 2,495 | -4.01% | -0.86% |
| Princesa Sumama | 0.77% | 311 | 352 | -11.65% | -2.57% |
| Salinding | 4.84% | 1,964 | 2,031 | -3.30% | -0.70% |
| San Isidro | 1.62% | 659 | 684 | -3.65% | -0.78% |
| Sibuguey | 2.45% | 994 | 1,139 | -12.73% | -2.83% |
| Siloh | 4.03% | 1,635 | 1,811 | -9.72% | -2.13% |
| Villagracia | 1.02% | 412 | 348 | 18.39% | 3.62% |
| Siay Total | 40,585 | 41,572 | -2.37% | -0.50% | |
Economy
The annual regular revenue of Siay for the fiscal year of 2016 was ₱123,353,094.76.
details
| Fiscal Year | Annual Regular Income | Change |
|---|---|---|
| 2009 | 68,449,497.67 | – |
| 2010 | 70,575,245.18 | 3.11% |
| 2011 | 77,511,650.34 | 9.83% |
| 2012 | 73,866,090.93 | -4.70% |
| 2013 | 88,275,449.65 | 19.51% |
| 2014 | 97,876,230.59 | 10.88% |
| 2015 | 112,700,148.67 | 15.15% |
| 2016 | 123,353,094.76 | 9.45% |
End notes:
| ||
Demographics
Households
The household population of Siay in the 2015 Census was 41,455 broken down into 9,215 households or an average of 4.50 members per household.
details
| Census date | Household population | Number of households | Average household size |
|---|---|---|---|
| 24,689 | 4,523 | 5.46 | |
| 29,270 | 5,808 | 5.04 | |
| 32,799 | 6,238 | 5.26 | |
| 33,896 | 6,659 | 5.09 | |
| 38,229 | 7,992 | 4.78 | |
| 41,455 | 9,215 | 4.50 |
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 group | Population (2015) | Age group percentage |
|---|---|---|
| Under 1 | 920 | 2.21% |
| 1 to 4 | 4,097 | 9.86% |
| 5 to 9 | 5,075 | 12.21% |
| 10 to 14 | 4,876 | 11.73% |
| 15 to 19 | 4,448 | 10.70% |
| 20 to 24 | 3,970 | 9.55% |
| 25 to 29 | 3,154 | 7.59% |
| 30 to 34 | 2,544 | 6.12% |
| 35 to 39 | 2,446 | 5.88% |
| 40 to 44 | 2,159 | 5.19% |
| 45 to 49 | 2,131 | 5.13% |
| 50 to 54 | 1,718 | 4.13% |
| 55 to 59 | 1,382 | 3.32% |
| 60 to 64 | 965 | 2.32% |
| 65 to 69 | 690 | 1.66% |
| 70 to 74 | 427 | 1.03% |
| 75 to 79 | 300 | 0.72% |
| 80 and over | 270 | 0.65% |
| Total | 41,572 | 100.00% |
| ||
Historical population
The population of Siay grew from 14,088 in 1960 to 40,585 in 2020, an increase of 26,497 people over the course of 60 years. The latest census figures in 2020 denote a negative growth rate of 0.50%, or a decrease of 987 people, from the previous population of 41,572 in 2015.
details
| Census date | Population | Growth rate |
|---|---|---|
| – | – | |
| – | – | |
| – | – | |
| – | – | |
| 14,088 | – | |
| 32,922 | 8.66% | |
| 37,816 | 2.82% | |
| 17,004 | -14.77% | |
| 24,689 | 3.80% | |
| 29,303 | 3.26% | |
| 32,844 | 2.48% | |
| 33,902 | 0.44% | |
| 38,229 | 4.47% | |
| 41,572 | 1.61% | |
| 40,585 | -0.50% |
The total number of registered voters or electorate in Siay for the year 2019 was 26,020, broken down into 13,390 males and 12,630 females.
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, Zamboanga del Sur, Tangub, Misamis Occidental, Dipolog, Zamboanga del Norte, Ozamiz, Misamis Occidental, Dapitan, Zamboanga del Norte, and Zamboanga City. The nearest municipalities are Imelda, Zamboanga Sibugay, Diplahan, Zamboanga Sibugay, Payao, Zamboanga Sibugay, Kabasalan, Zamboanga Sibugay, Malangas, Zamboanga Sibugay, and Naga, Zamboanga Sibugay. 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
- Imelda, Zamboanga Sibugay, 10.47 kilometers (6.50 miles) to the Southeast (S47°E)
- Diplahan, Zamboanga Sibugay, 13.43 kilometers (8.35 miles) to the East (S83°E)
- Payao, Zamboanga Sibugay, 14.88 kilometers (9.24 miles) to the South‑Southwest (S27°W)
- Kabasalan, Zamboanga Sibugay, 15.14 kilometers (9.41 miles) to the Northwest (N48°W)
- Malangas, Zamboanga Sibugay, 20.29 kilometers (12.61 miles) to the East‑Southeast (S65°E)
- Naga, Zamboanga Sibugay, 20.91 kilometers (12.99 miles) to the West‑Northwest (N63°W)
Nearest cities
- Pagadian, Zamboanga del Sur, 64.47 kilometers (40.06 miles) to the East‑Northeast (N78°E)
- Tangub, Misamis Occidental, 105.35 kilometers (65.46 miles) to the East‑Northeast (N68°E)
- Dipolog, Zamboanga del Norte, 110.59 kilometers (68.72 miles) to the North‑Northeast (N28°E)
- Ozamiz, Misamis Occidental, 118.64 kilometers (73.72 miles) to the East‑Northeast (N66°E)
- Dapitan, Zamboanga del Norte, 121.72 kilometers (75.63 miles) to the North‑Northeast (N30°E)
- Zamboanga City, 124.22 kilometers (77.19 miles) to the Southwest (S44°W)
Distance from Manila: 788.82 kilometers (490.15 miles) to the North‑Northwest (N15°W)
Notes
- Unless otherwise specified, population count (excluding percentages), household data, and land area figures are derived from the Philippine Statistics Authority.
- Data on registered voters is from the Commission on Elections.
- Data on annual regular income is from the Bureau of Local Government Finance, Department of Finance
- Postal code information is from the Philippine Postal Corporation.