Zone I, Municipality of San Mariano, Province of Isabela

Summary data
Typebarangay
Island groupLuzon
RegionCagayan Valley (Region II)
ProvinceIsabela
MunicipalitySan Mariano
Postal code3332
Population (2020)1,590
Philippine major island(s)Luzon
Coordinates16.9821, 122.0113 (16° 59' North, 122° 1' East)
Estimated elevation above sea level83.0 meters (272.3 feet)

Zone I, formerly Poblacion, is a barangay in the municipality of San Mariano, in the province of Isabela. Its population as determined by the 2020 Census was 1,590. This represented 2.64% of the total population of San Mariano.

Demographics

Households

The household population of Zone I in the 2015 Census was 1,574 broken down into 332 households or an average of 4.74 members per household.

details
Number of households in Zone I (1990‑2015)
Census dateHousehold populationNumber of householdsAverage household size
1,6902825.99
1,3562675.08
1,4782785.32
1,6333225.07
1,5493184.87
1,5743324.74

Population by age group

According to the 2015 Census, the age group with the highest population in Zone I is 15 to 19, with 173 individuals. Conversely, the age group with the lowest population is 80 and over, with 13 individuals.

details
Population of Zone I by age group (2015 census)
Age groupPopulation (2015)Age group percentage
Under 1342.15%
1 to 41328.33%
5 to 91439.03%
10 to 1415910.04%
15 to 1917310.92%
20 to 241428.96%
25 to 291247.83%
30 to 341147.20%
35 to 39986.19%
40 to 44996.25%
45 to 491016.38%
50 to 54674.23%
55 to 59734.61%
60 to 64432.71%
65 to 69332.08%
70 to 74171.07%
75 to 79191.20%
80 and over130.82%
Total1,584100.00%
  • Youth Dependency Ratio: 45.26
  • Old Age Dependency Ratio: 7.93
  • Total Dependency Ratio: 53.19
  • Median Age: 25.36

Historical population

The population of Zone I fell from 1,690 in 1990 to 1,590 in 2020, a decrease of 100 people over the course of 30 years. The latest census figures in 2020 denote a positive growth rate of 0.08%, or an increase of 6 people, from the previous population of 1,584 in 2015.

Population of Zone I (1990‑2020)
Census datePopulationGrowth rate
1,690
1,410-3.34%
1,5261.71%
1,6330.94%
1,566-1.51%
1,5840.22%
1,5900.08%

Location

Zone I is situated at approximately 16.9821, 122.0113, in the island of Luzon. Elevation at these coordinates is estimated at 83.0 meters or 272.3 feet above mean sea level.


Adjacent barangays

Zone I 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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