San Ildefonso, Municipality of San Nicolas, Province of Ilocos Norte

Summary data
Typebarangay
Island groupLuzon
RegionIlocos Region (Region I)
ProvinceIlocos Norte
MunicipalitySan Nicolas
Postal code2901
Population (2020)1,743
Philippine major island(s)Luzon
Coordinates18.1744, 120.5962 (18° 10' North, 120° 36' East)
Estimated elevation above sea level13.4 meters (44.0 feet)

San Ildefonso, formerly Poblacion, is a barangay in the municipality of San Nicolas, in the province of Ilocos Norte. Its population as determined by the 2020 Census was 1,743. This represented 4.48% of the total population of San Nicolas.

Demographics

Households

The household population of San Ildefonso in the 2015 Census was 1,464 broken down into 354 households or an average of 4.14 members per household.

details
Number of households in San Ildefonso (1990‑2015)
Census dateHousehold populationNumber of householdsAverage household size
1,2412574.83
1,2662604.87
1,3712735.02
1,2242924.19
1,2742994.26
1,4643544.14

Population by age group

According to the 2015 Census, the age group with the highest population in San Ildefonso is 10 to 14, with 147 individuals. Conversely, the age group with the lowest population is 75 to 79, with 21 individuals.

details
Population of San Ildefonso by age group (2015 census)
Age groupPopulation (2015)Age group percentage
Under 1312.11%
1 to 41137.69%
5 to 91359.18%
10 to 1414710.00%
15 to 191288.71%
20 to 241389.39%
25 to 291137.69%
30 to 341107.48%
35 to 391006.80%
40 to 44896.05%
45 to 49896.05%
50 to 54775.24%
55 to 59513.47%
60 to 64382.59%
65 to 69312.11%
70 to 74302.04%
75 to 79211.43%
80 and over291.97%
Total1,470100.00%
  • Youth Dependency Ratio: 45.66
  • Old Age Dependency Ratio: 11.9
  • Total Dependency Ratio: 57.56
  • Median Age: 26.90

Historical population

The population of San Ildefonso grew from 1,246 in 1990 to 1,743 in 2020, an increase of 497 people over the course of 30 years. The latest census figures in 2020 denote a positive growth rate of 3.65%, or an increase of 273 people, from the previous population of 1,470 in 2015.

Population of San Ildefonso (1990‑2020)
Census datePopulationGrowth rate
1,246
1,2830.55%
1,3711.43%
1,236-1.42%
1,2741.11%
1,4702.76%
1,7433.65%

Location

San Ildefonso is situated at approximately 18.1744, 120.5962, in the island of Luzon. Elevation at these coordinates is estimated at 13.4 meters or 44.0 feet above mean sea level.


Adjacent barangays

San Ildefonso shares a common border with the following barangay(s):

Notes

  1. Data on population, and households, are from the Philippine Statistics Authority.
  2. Postal code information is from the Philippine Postal Corporation.
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