Siain, Municipality of Buenavista, Province of Quezon
| Type | barangay |
|---|---|
| Island group | Luzon |
| Region | CALABARZON (Region IV‑A) |
| Province | Quezon |
| Municipality | Buenavista |
| Population (2020) | 422 |
| Philippine major island(s) | Luzon |
| Coordinates | 13.7021, 122.4491 (13° 42' North, 122° 27' East) |
| Estimated elevation above sea level | 226.4 meters (742.8 feet) |
Siain is a barangay in the municipality of Buenavista, in the province of Quezon. Its population as determined by the 2020 Census was 422. This represented 1.35% of the total population of Buenavista.
Demographics
Households
The household population of Siain in the 2015 Census was 393 broken down into 89 households or an average of 4.42 members per household.
details
| Census date | Household population | Number of households | Average household size |
|---|---|---|---|
| 267 | 46 | 5.80 | |
| 367 | 59 | 6.22 | |
| 420 | 71 | 5.92 | |
| 323 | 65 | 4.97 | |
| 390 | 72 | 5.42 | |
| 393 | 89 | 4.42 |
Population by age group
According to the 2015 Census, the age group with the highest population in Siain is 1 to 4, with 52 individuals. Conversely, the age group with the lowest population is 75 to 79, with 1 individual.
details
| Age group | Population (2015) | Age group percentage |
|---|---|---|
| Under 1 | 16 | 4.07% |
| 1 to 4 | 52 | 13.23% |
| 5 to 9 | 50 | 12.72% |
| 10 to 14 | 46 | 11.70% |
| 15 to 19 | 40 | 10.18% |
| 20 to 24 | 37 | 9.41% |
| 25 to 29 | 32 | 8.14% |
| 30 to 34 | 29 | 7.38% |
| 35 to 39 | 16 | 4.07% |
| 40 to 44 | 13 | 3.31% |
| 45 to 49 | 16 | 4.07% |
| 50 to 54 | 20 | 5.09% |
| 55 to 59 | 12 | 3.05% |
| 60 to 64 | 5 | 1.27% |
| 65 to 69 | 3 | 0.76% |
| 70 to 74 | 3 | 0.76% |
| 75 to 79 | 1 | 0.25% |
| 80 and over | 2 | 0.51% |
| Total | 393 | 100.00% |
| ||
Historical population
The population of Siain grew from 267 in 1990 to 422 in 2020, an increase of 155 people over the course of 30 years. The latest census figures in 2020 denote a positive growth rate of 1.51%, or an increase of 29 people, from the previous population of 393 in 2015.
| Census date | Population | Growth rate |
|---|---|---|
| 267 | – | |
| 367 | 6.14% | |
| 420 | 2.93% | |
| 323 | -3.56% | |
| 390 | 7.10% | |
| 393 | 0.15% | |
| 422 | 1.51% |
Location
Siain is situated at approximately 13.7021, 122.4491, in the island of Luzon. Elevation at these coordinates is estimated at 226.4 meters or 742.8 feet above mean sea level.
Adjacent barangays
Siain shares a common border with the following barangay(s):
Notes
- Data on population, and households, are from the Philippine Statistics Authority.