Alfonso, Municipality of Gregorio Del Pilar, Province of Ilocos Sur
| Type | barangay |
|---|---|
| Island group | Luzon |
| Region | Ilocos Region (Region I) |
| Province | Ilocos Sur |
| Municipality | Gregorio Del Pilar |
| Postal code | 2720 |
| Population (2020) | 997 |
| Philippine major island(s) | Luzon |
| Coordinates | 17.1616, 120.6093 (17° 10' North, 120° 37' East) |
| Estimated elevation above sea level | 291.8 meters (957.3 feet) |
Alfonso, formerly Tangaoan, is a barangay in the municipality of Gregorio Del Pilar, in the province of Ilocos Sur. Its population as determined by the 2020 Census was 997. This represented 22.29% of the total population of Gregorio Del Pilar.
Demographics
Households
The household population of Alfonso in the 2015 Census was 958 broken down into 185 households or an average of 5.18 members per household.
details
| Census date | Household population | Number of households | Average household size |
|---|---|---|---|
| 695 | 130 | 5.35 | |
| 757 | 139 | 5.45 | |
| 828 | 148 | 5.59 | |
| 882 | 161 | 5.48 | |
| 964 | 175 | 5.51 | |
| 958 | 185 | 5.18 |
Population by age group
According to the 2015 Census, the age group with the highest population in Alfonso is 25 to 29, with 106 individuals. Conversely, the age groups with the lowest population are in the ranges 70 to 74, and 80 and over, with 11 individuals.
details
| Age group | Population (2015) | Age group percentage |
|---|---|---|
| Under 1 | 13 | 1.36% |
| 1 to 4 | 84 | 8.77% |
| 5 to 9 | 101 | 10.54% |
| 10 to 14 | 82 | 8.56% |
| 15 to 19 | 77 | 8.04% |
| 20 to 24 | 92 | 9.60% |
| 25 to 29 | 106 | 11.06% |
| 30 to 34 | 70 | 7.31% |
| 35 to 39 | 57 | 5.95% |
| 40 to 44 | 45 | 4.70% |
| 45 to 49 | 43 | 4.49% |
| 50 to 54 | 44 | 4.59% |
| 55 to 59 | 45 | 4.70% |
| 60 to 64 | 41 | 4.28% |
| 65 to 69 | 22 | 2.30% |
| 70 to 74 | 11 | 1.15% |
| 75 to 79 | 14 | 1.46% |
| 80 and over | 11 | 1.15% |
| Total | 958 | 100.00% |
| ||
Historical population
The population of Alfonso grew from 695 in 1990 to 997 in 2020, an increase of 302 people over the course of 30 years. The latest census figures in 2020 denote a positive growth rate of 0.84%, or an increase of 39 people, from the previous population of 958 in 2015.
| Census date | Population | Growth rate |
|---|---|---|
| 695 | – | |
| 757 | 1.61% | |
| 828 | 1.94% | |
| 882 | 0.88% | |
| 964 | 3.29% | |
| 958 | -0.12% | |
| 997 | 0.84% |
Location
Alfonso is situated at approximately 17.1616, 120.6093, in the island of Luzon. Elevation at these coordinates is estimated at 291.8 meters or 957.3 feet above mean sea level.
Adjacent barangays
Alfonso shares a common border with the following barangay(s):
Notes
- Data on population, and households, are from the Philippine Statistics Authority.
- Postal code information is from the Philippine Postal Corporation.