Barangay Santo Rosario is a barangay in Iba, Zambales, in the Central Luzon (Region III) of the Philippines. Registered under PSGC code 0307105018 with ZIP code 2201, it had a 2020 Census population of 4,366. That makes it the 6th most populous of Iba's 14 barangays (7.3% of the municipal total of 59,580). It sits at about 12.2 m above sea level at coordinates 15.3351, 119.9657.
Overview
Barangay Santo Rosario is a local community situated within Iba, Zambales. Serving as the primary administrative building block of local governance, it connects local residents directly to municipal public services, community development, and regional infrastructure networks.
Demographics & Population Trends
Insights into growth, age distributions, and household composition.
Historical Population Growth
Barangay Santo Rosario is tracked across every census round conducted by the Philippine Statistics Authority. The table and bar chart below trace its recorded population from 1990 to 2020, together with the annualized growth rate and net population change between counts. Read side by side, they show whether Santo Rosario is expanding, contracting, or holding steady within Iba, a signal that informs housing demand, school-age population, and the delivery of local public services.
| Census Date | Population | Growth | Net |
|---|---|---|---|
| 1990 May 1 | 2,512 | — | — |
| 1995 Sep 1 | 2,817 | +2.17% | 305 |
| 2000 May 1 | 2,544 | -2.16% | -273 |
| 2007 Aug 1 | 3,588 | +4.86% | 1,044 |
| 2010 May 1 | 3,932 | +3.39% | 344 |
| 2015 Aug 1 | 3,979 | +0.23% | 47 |
| 2020 May 1 | 4,366 | +1.97% | 387 |
Age Distribution (2015 Census)
The age profile of Barangay Santo Rosario is drawn from the 2015 Census and grouped into five-year age bands. The table and bar chart below show how residents split across the young dependent population, the working-age population, and older residents, the balance that drives the local dependency ratio and median age. A community weighted toward working-age adults points to a wider labor force, while a broad base of children signals future demand for schools, health centers, and youth programs in Iba.
| Age Group | Population | Share |
|---|---|---|
| Under 1 | 106 | 2.66% |
| 1 to 4 | 429 | 10.78% |
| 5 to 9 | 432 | 10.86% |
| 10 to 14 | 386 | 9.7% |
| 15 to 19 | 368 | 9.25% |
| 20 to 24 | 311 | 7.82% |
| 25 to 29 | 304 | 7.64% |
| 30 to 34 | 275 | 6.91% |
| 35 to 39 | 292 | 7.34% |
| 40 to 44 | 214 | 5.38% |
| 45 to 49 | 234 | 5.88% |
| 50 to 54 | 154 | 3.87% |
| 55 to 59 | 167 | 4.2% |
| 60 to 64 | 115 | 2.89% |
| 65 to 69 | 92 | 2.31% |
| 70 to 74 | 37 | 0.93% |
| 75 to 79 | 24 | 0.6% |
| 80 and over | 39 | 0.98% |
Young population (0-14) · 34%
Working-age population (15-64) · 61.17%
Older population (65+) · 4.83%
Household Trends
Household formation in Barangay Santo Rosario is measured each census through the number of households and the average household size. The table and bar chart below plot how the household count has moved across the years. A rising number of households alongside a falling average size usually reflects smaller family units and new home formation, while a steady average size suggests multigenerational living remains common. These figures help gauge local housing stock, utility demand, and the pace of residential development in Iba.
| Census Date | Households | Avg. Size |
|---|---|---|
| 1990 May 1 | 486 | 5.17 |
| 1995 Sep 1 | 564 | 4.99 |
| 2000 May 1 | 563 | 4.52 |
| 2007 Aug 1 | 787 | 4.56 |
| 2010 May 1 | 901 | 4.36 |
| 2015 Aug 1 | 933 | 4.25 |
Location & Environment
Geographic coordinates, comparative elevation, and environmental risk profile.
Relative rank among Iba's barangays by 2020 population.
Elevation profile, compared to the 12.2 m municipal median.
Barangay Santo Rosario is located at approximately 15.3351, 119.9657 (15°20'06" N, 119°57'57" E) on Luzon , roughly 12.2 meters above sea level.
Hazard Profile & Risk Context
Central Luzon lies along the main track of Pacific tropical cyclones and sees frequent typhoon passage during the June to November season.
HighCentral Luzon has moderate seismic exposure from regional fault systems, with occasional felt earthquakes.
ModerateLocalized flooding can occur during heavy rainfall, depending on drainage and proximity to rivers and low ground.
ModerateGeneral planning context derived from topographic models. Refer to PHIVOLCS and municipal DRRMO advisories for official disaster risk mapping.
Governance & Administrative Record
Local administration setup and statutory registry parameters.
As the primary administrative tier in the Philippines, Barangay Santo Rosario in municipality of Iba, province of Zambales is led by an elected Punong Barangay alongside a Sangguniang Barangay composed of seven elected council members. The barangay council oversees neighborhood disputes via the Lupong Tagapamayapa, enacts local ordinances, and maintains peace and public safety.
Official Registry
PSGC Statutory Data Sheet
Surrounding Area & Local Culture
Nearby communities, cultural landmarks, and local services in Iba.
Nearest Barangays
Regional Culinary Highlights
Home to the sweetest mangoes; locals incorporate them into everything from fresh salsas for grilled fish to desserts lik...
Pinakbet (Zambales-style)Often uses fresh seafood like shrimp or bangus (milkfish) instead of just meat, highlighting the coastal influence.
Sinigang na Isda sa ManggaA unique souring method where instead of sampalok (tamarind), local green mangoes are used to give the soup a distinct,...
KakaninVarious sticky rice cakes made with coconut and brown sugar, often served as snacks during town festivities.
Other Barangays in Iba
Frequently Asked Questions
Where is Barangay Santo Rosario located?
Barangay Santo Rosario is a barangay in Iba, Zambales, in the Central Luzon (Region III) of the Philippines. Registered under PSGC code 0307105018 with ZIP code 2201, it had a 2020 Census population of 4,366. That makes it the 6th most populous of Iba's 14 barangays (7.3% of the municipal total of 59,580). It sits at about 12.2 m above sea level at coordinates 15.3351, 119.9657.
What is the population of Barangay Santo Rosario?
4,366 as of the 2020 Census, the 6th largest of Iba's 14 barangays (7.3% of the municipal total).
What is the PSGC code of Barangay Santo Rosario?
The PSGC code is 0307105018, a nine-digit identifier in the PSA classification.
What is the ZIP code of Barangay Santo Rosario?
ZIP 2201, covering Iba and its barangays.
How many barangays does Iba have?
14 barangays per the PSA PSGC 1Q 2026 release.
Notes & Data Sources
- Administrative boundaries sourced from the PSA PSGC 1Q 2026 dataset release.
- Population figures and geographical metrics are integrated from official PhilAtlas and PSA Census records.