Irosin
Municipality in Sorsogon, Philippines
From Wikipedia, the free encyclopedia
Irosin, officially the Municipality of Irosin (Southern Sorsoganon: Bungto san Irosin; Waray: Bungto han Irosin, Tagalog: Bayan ng Irosin), is a municipality in the province of Sorsogon, Philippines. According to the 2024 census, it has a population of 59,540 people.[5]
Irosin | |
|---|---|
| Municipality of Irosin | |
Irosin Beacon with Mount Bulusan in the background | |
 Flag | |
 Map of Sorsogon with Irosin highlighted | |
 Interactive map of Irosin | |
.svg)  Irosin Location within the Philippines | |
| Coordinates: 12°42′18″N 124°01′55″E | |
| Country | Philippines |
| Region | Bicol Region |
| Province | Sorsogon |
| District | 2nd district |
| Barangays | 28 (see Barangays) |
| Government | |
| • Type | Sangguniang Bayan |
| • Mayor | Alfredo J. Cielo Jr. |
| • Vice Mayor | Christian D. Lim |
| • Representative | Manuel L. Fortes Jr. |
| • Municipal Council | Members |
| • Electorate | 41,494 voters (2025) |
| Area | |
• Total | 149.87 km2 (57.87 sq mi) |
| Elevation | 168 m (551 ft) |
| Highest elevation | 791 m (2,595 ft) |
| Lowest elevation | 20 m (66 ft) |
| Population (2024 census)[3] | |
• Total | 59,540 |
| • Density | 397.3/km2 (1,029/sq mi) |
| • Households | 12,753 |
| Economy | |
| • Income class | 2nd municipal income class |
| • Poverty incidence | 26.41 |
| • Revenue | ₱ 312.5 million (2022) |
| • Assets | ₱ 609.6 million (2022) |
| • Expenditure | ₱ 275.9 million (2022) |
| • Liabilities | ₱ 272 million (2022) |
| Service provider | |
| • Electricity | Sorsogon 1 Electric Cooperative (SORECO 1) |
| Time zone | UTC+8 (PST) |
| ZIP code | 4707 |
| PSGC | |
| IDD : area code | +63 (0)56 |
| Native languages | Sorsogon language Tagalog |
| Website | www |
History
Irosin frequently experienced erosion due to river inundations. On December 24, 1933, massive flooding caused numerous fatalities. To prevent the violent surge of the river from eroding the town's mainland, a concrete river control dike was constructed in 1937 under Mayor Felipe Santiago and Congressman Norberto Roque.[6][better source needed]
Contemporary period
On April 10, 1989, Irosin was defended by military and police forces, led by Lieutenant Antonio Dy, against approximately 200 communist rebels of the New People's Army, which resulted in 20 rebel casualties; along with the deaths of three female civilians in the crossfire.[7] Dy later received the "Medalya ng Kagitingan" Award in August for leading his 13 policemen to defend Irosin's municipal hall.[8]
The local tourism industry has significant potential, as ecological tourism is a global trend and the national government aims to develop Bicol as a major tourist hub. Given its variety of natural tourist spots and strategic location, Irosin serves as a convergence area for both foreign and domestic tourists and visitors.[9]
| Climate data for Irosin, Sorsogon | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | 27 (81) |
28 (82) |
29 (84) |
31 (88) |
31 (88) |
30 (86) |
29 (84) |
29 (84) |
29 (84) |
29 (84) |
29 (84) |
28 (82) |
29 (84) |
| Mean daily minimum °C (°F) | 22 (72) |
21 (70) |
22 (72) |
23 (73) |
24 (75) |
25 (77) |
25 (77) |
25 (77) |
25 (77) |
24 (75) |
23 (73) |
23 (73) |
24 (74) |
| Average precipitation mm (inches) | 65 (2.6) |
44 (1.7) |
42 (1.7) |
39 (1.5) |
87 (3.4) |
150 (5.9) |
184 (7.2) |
153 (6.0) |
163 (6.4) |
154 (6.1) |
127 (5.0) |
100 (3.9) |
1,308 (51.4) |
| Average rainy days | 13.9 | 9.2 | 11.0 | 12.5 | 19.6 | 24.3 | 26.5 | 25.0 | 25.5 | 24.4 | 19.4 | 15.1 | 226.4 |
| Source: Meteoblue (modeled/calculated data, not measured locally)[10] | |||||||||||||
Political geography
Irosin is the only landlocked municipality in Sorsogon province.
Irosin is politically subdivided into 28 barangays, each consisting of puroks, and some with sitios.
- Bagsangan
- Bacolod (Poblacion)
- Batang
- Bolos
- Buenavista
- Bulawan
- Carriedo
- Casini
- Cawayan
- Cogon
- Gabao
- Gulang-Gulang
- Gumapia
- Santo Domingo (Lamboon)
- Liang
- Macawayan
- Mapaso
- Monbon
- Patag
- Salvacion
- San Agustin (Poblacion)
- San Isidro (Palogtok)
- San Juan (Poblacion)
- San Julian (Poblacion)
- San Pedro (Poblacion)
- Tabon-Tabon
- Tinampo
- Tongdol
Demographics
| Year | Pop. | ±% p.a. |
|---|---|---|
| 1903 | 8,644 | — |
| 1918 | 14,775 | +3.64% |
| 1939 | 17,017 | +0.68% |
| 1948 | 19,317 | +1.42% |
| 1960 | 23,134 | +1.51% |
| 1970 | 27,953 | +1.91% |
| 1975 | 30,989 | +2.09% |
| 1980 | 34,978 | +2.45% |
| 1990 | 37,887 | +0.80% |
| 1995 | 41,005 | +1.49% |
| 2000 | 45,507 | +2.26% |
| 2007 | 49,968 | +1.30% |
| 2010 | 51,777 | +1.30% |
| 2015 | 56,662 | +1.73% |
| 2020 | 59,267 | +0.95% |
| 2024 | 59,540 | +0.11% |
| Source: Philippine Statistics Authority[11][12][13][14][15] | ||
Economy
Education
The Iroson Schools District Office governs all educational institutions within the municipality. It oversees the management and operations of all private and public, from primary to secondary schools.[24]
Primary and elementary schools
- Bacolod Elementary School
- Bagsangan Elementary School
- Batang Elementary School
- Benedicto F. Gabito Elementary School
- BLISS Elementary School
- Bolos Elementary School
- Buenavista Elementary School
- Bulawan Elementary School
- Carriedo Elementary School
- Casini Elementary School
- Cawayan Elementary School
- Cogon Elementary School
- Gabao Elementary School
- Gulang-Gulang Elementary School
- Gumapia Elementary School
- Holy Spirit Academy
- Holy Trinity Community School
- Irosin Central School
- Liang Elementary School
- Macawayan Elementary School
- Mapaso Elementary School
- Monbon Elementary School
- Myrtle Christian Learning Center
- Omagom Elementary School
- Salvacion Elementary School
- San Agustin Elementary School
- San Isidro Elementary School
- Severino E. Fortes Memorial School
- Sorsogon Family and Teachers Learning Center
- Sto. Domingo Elementary School
- Tabon-Tabon Elementary School
- Tinampo Elementary School
- Tongdol Elementary School
- Tulay Elementary School
Secondary schools
- Gabao National High School
- Gallanosa National High School
- Irosin North National High School
- Patag Integrated School
Technical and vocational school
- Irosin Institute of Science and Technology[25]
Higher educational institution
- Veritas College of Irosin
- Bonaventure Colleges of Sorsogon Inc.
