Coordinates: 6°34′N 124°03′E / 6.57°N 124.05°E / 6.57; 124.05
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Municipality of Kalamansig
Public Park with Communication Tower
Public Park with Communication Tower
Flag of Kalamansig
Official seal of Kalamansig
Map of Sultan Kudarat with Kalamansig highlighted
Map of Sultan Kudarat with Kalamansig highlighted
Kalamansig is located in Philippines
Location within the Philippines
Coordinates: 6°34′N 124°03′E / 6.57°N 124.05°E / 6.57; 124.05
ProvinceSultan Kudarat
District 2nd district
FoundedDecember 29, 1961
Barangays15 (see Barangays)
 • TypeSangguniang Bayan
 • MayorJoaquin T. Concha
 • Vice MayorRolando P. Garcia
 • RepresentativeHoracio P. Suansing Jr.
 • Municipal Council
 • Electorate30,492 voters (2022)
 • Total699.20 km2 (269.96 sq mi)
56 m (184 ft)
Highest elevation
655 m (2,149 ft)
Lowest elevation
0 m (0 ft)
 (2020 census)[3]
 • Total50,900
 • Density73/km2 (190/sq mi)
 • Households
 • Income class1st municipal income class
 • Poverty incidence
% (2018)[4]
 • Revenue₱ 293.9 million (2020)
 • Assets₱ 513.6 million (2020)
 • Expenditure₱ 247 million (2020)
 • Liabilities₱ 145.3 million (2020)
Service provider
 • ElectricitySultan Kudarat Electric Cooperative (SUKELCO)
Time zoneUTC+8 (PST)
ZIP code
IDD:area code+63 (0)64
Native languagesHiligaynon
Cotabato Manobo

Kalamansig, officially the Municipality of Kalamansig (Maguindanaon: Inged nu Kalamansig, Jawi: ايڠد نو كلمانسيݢ), is a 1st class municipality in the province of Sultan Kudarat, Philippines. According to the 2020 census, it has a population of 50,900 people.[3]

The main means of livelihood of the people is farming and fishing. The municipality's marine environment is home to various species of marine wildlife and plants, the most important of which is the giant tamilok, the largest shipworm species in the world. The species can only be found within the area, and no where else in the world, making Kalamansig an important biodiversity area. Formerly hunted by the locals, the giant tamiloks are now strictly protected by the municipality, specifically the former hunters of the species, after research confirmed the high importance of the species in the area's biodiversity.[5]

The nearest point of entry is through Cotabato Airport, Cotabato City. The town can easily be reached by taking the fully cemented Upi-Lebak National Road. Convenient and safe public transport that plies directly to Kalamansig are also available at NCCC Mall Davao, General Santos Public Terminal, Cotabato City Lebak-Kalamansig Terminal and Tacurong City Public Terminal.


Like most municipalities in the Philippines, Kalamansig traces its name from various legendary origins. A popular folklore among the Manobos, a tribe of people who were among the earliest inhabitants of the place, explained that the name originated from a phrase “Kulaman-su-wayeg”, which literally translates as “Kulaman in the water”. Kulaman is said to be a famous Sultan of the Valley during the seventeenth century. According to the legend, a long famine came to the place and the Sultan, who was a loving father and provider to his family, ventured alone and gathered cassava, a staple food of the Manobos, for their consumption. Before returning home, the Sultan decided to wash the root crop in a river, but a sudden and strong river current arrived and swept the aging Sultan from his feet, carrying him downstream and was drowned in the process. His body was later found and recovered downriver, coining the word “Kulaman-sa-ig” (Kulaman in the water).

The name evolved into “Kalamansig” which later become the official name. In honor of this Manobo tribal leader, the river where he was found was named after him and later, the entire upper valley was called “Kulaman”. This barangay is now part of the Municipality of Sen. Ninoy Aquino.


150-foot tower of United States forces. Built in early 1920 (US colonization period) as a wireless communication station connecting Cotabato, Malabang and Lanao still stands today.[6]

The existing seat of government of Kalamansig was formerly the municipality of Lebak. The first attempt to separate was on Lebak (presently Kalamansig) was under the municipal district of Kiamba while Salaman (now Lebak) use under the district of Dinaig on August 18, 1947, under Executive Order No. 82.[7] and it was again reunited under one independent municipality of Lebak on December 31, 1948. The seat of government was transferred to Salaman on April 12, 1951.

Ten years later, the Municipality of Kalamansig formally created by the virtue of Executive Order No. 459 dated December 29, 1961 signed by Carlos P. Garcia,[8] creating the municipality of Kalamansig from certain barangays of Lebak and Palimbang.

There are 20 barangays and sitios carved out from Lebak: Lun, Pitas, Dansalan, Pedtegenan, Madu, Port Lebak, Lenek, Santa Clara, Sebayor, Nalilidan, Bosawon, Calubcub, Camp III, Poral, Limulan, Simsiman, Cadiz and Tipudos. The 8 barangays and sitios were taken from Palimbang are Sangay, Mat, Danawan, Paril, Babancao, Basiawan, Narra and North Kulaman.

Kalamansig was transferred from Cotabato Province to Province of Sultan Kudarat on November 22, 1973, by Presidential Decree No. 341 by President Ferdinand Marcos.[9] Kalamansig lies the few miles from the epicenter of the devastating 1976 Moro Gulf earthquake.

In 2004, gigantic shipworms were discovered by the locals within the municipal waters. In 2017, the shipworms were formally researched on by local and international scientists. The research confirmed that the giant Kalamansig tamilok is kuphus polythalamia and is the largest species of its kind in the world. Due to the research, Kamalansig became the first and only known permanent natural habitat of the endangered species.[10][11]


Kalamansig is a coastal municipality located to west of Sultan kudarat. Limulan River is the longest river in Kalamansig with a total length of 27 km (17 mi).


Kalamansig is politically subdivided into 15 barangays. Each barangay consists of puroks while some have sitios.

  • Bantogon
  • Cadiz
  • Datu Ito Andong
  • Datu Wasay
  • Dumangas Nuevo
  • Hinalaan
  • Limulan
  • Nalilidan
  • Obial
  • Pag-asa (Sultan Gunting Mopak)
  • Paril
  • Poblacion
  • Sabanal
  • Sangay
  • Santa Clara
  • Santa Maria


Climate data for Kalamansig, Sultan Kudarat
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Average high °C (°F) 31
Average low °C (°F) 23
Average precipitation mm (inches) 119
Average rainy days 19.2 17.9 20.9 24.6 29.4 29.1 29.7 28.9 27.2 28.5 27.2 22.5 305.1
Source: Meteoblue[12]


Population census of Kalamansig
YearPop.±% p.a.
1970 15,875—    
1975 21,740+6.51%
1980 24,174+2.14%
1990 30,779+2.45%
1995 35,900+2.93%
2000 44,645+4.78%
2007 45,263+0.19%
2010 46,408+0.91%
2015 49,059+1.06%
2020 50,900+0.73%
Source: Philippine Statistics Authority[13][14][15][16]




  • Datu Guiabar Pilot School/DGPS (Barangay Poblacion), Kalamansig District I
  • Ricardo Cabaluna Memorial Elementary School/ RCMES (Barangay Sangay), Kalamansig District II
  • R.D. Talapian Sr. Memorial Elementary School/ RDTSMES (Barangay Paril), Kalamansig District II
  • Teresita Patalinjug Elementary School/TPES (Barangay Cadiz), Kalamansig District I
  • Artemio L. Martin Elementary School/ALMES (Barangay Obial), Kalamansig District I
  • Santa Clara Central Elementary School/ SCES (Barangay Santa Clara), Kalamansig District II
  • Nalilidan Elementary School/NES (Barangay Nalilidan), Kalamansig District II
  • Don Modesto S. Buenaflor Sr. Elementary School (Barangay Dumangas Nuevo), Kalamansig District I
  • Santa Maria Elementary School (Barangay Sta Maria), Kalamansig District I
  • Pag-asa Elementary School/PES (Barangay Pag-Asa), Kalamansig District II
  • Datu Etang Integrated School School/DEPS (Sitio Meles, Barangay Hinalaan), Kalamansig District II
  • Datu Wasay Elementary School/DWES (Sitio Proper, Barangay Datu Wasay), Kalamansig District II
  • Saint Andrew's Mission School-/SAMS (Sitio Tinandoc, Barangay Datu Wasay), Kalamansig District II
  • Costa Rica Elementary School (Costa Rica, Barangay Datu Wasay), Kalamansig District II
  • Limulan Elementary School LES (Barangay Limulan), Kalamansig District II
  • F.B. Concha Primary School/FBCPS (Barangay Limulan), Kalamansig District II
  • Datu Ito Andong Memorial Elementary School/DIAMES (Barangay Datu Ito Andong), Kalamansig District II
  • Ma-at Primary School /MPS (Sitio Ma-at, Barangay Sangay), Kalamansig District II

High school[edit]

  • Kalamansig National High School-Main (Barangay Poblacion)
  • Kalamansig National High School-Datu Wasay HS (Barangay Datu Wasay)
  • Kalamansig National High School-Sabanal HS (Barangay Sabanal)
  • Santa Clara National High School-(Barangay Santa Clara)
  • Sangay National High School (Barangay Sangay)
  • Notre Dame of Kalamansig City (Barangay Poblacion)

Integrated School[edit]

  • Datu Etang Integrated School
  • Private School integrated school



  1. ^ Municipality of Kalamansig | (DILG)
  2. ^ "2015 Census of Population, Report No. 3 – Population, Land Area, and Population Density" (PDF). Philippine Statistics Authority. Quezon City, Philippines. August 2016. ISSN 0117-1453. Archived (PDF) from the original on May 25, 2021. Retrieved July 16, 2021.
  3. ^ a b Census of Population (2020). "Region XII (Soccsksargen)". Total Population by Province, City, Municipality and Barangay. Philippine Statistics Authority. Retrieved 8 July 2021.{{cite encyclopedia}}: CS1 maint: numeric names: authors list (link)
  4. ^ "PSA Releases the 2018 Municipal and City Level Poverty Estimates". Philippine Statistics Authority. 15 December 2021. Retrieved 22 January 2022.
  5. ^ Kapuso Mo, Jessica Soho: Giant 'tamilok' in Kalamansig, Sultan Kudarat. YouTube. Archived from the original on 2021-12-11.
  6. ^ Agriculture, Philippines Bureau of (1922). Bulletin. p. 44. Retrieved 9 September 2017.
  7. ^ "Executive Order No. 82, s. 1847". Official Gazette of the Republic of the Philippines. Retrieved 22 August 2017.
  8. ^ "Legal Creation". Municipality of Kalamansig Official Website. Retrieved 20 December 2015.
  9. ^ "Presidential Decree No. 341, s. 1973". Official Gazette of the Republic of the Philippines. Retrieved 9 September 2017.
  10. ^ "The story behind the giant shipworm discovery that broke the internet".
  11. ^ "Rare giant shipworm mollusk found in Philippine waters". 18 April 2017.
  12. ^ "Kalamansig: Average Temperatures and Rainfall". Meteoblue. Retrieved 15 May 2020.
  13. ^ Census of Population (2015). "Region XII (Soccsksargen)". Total Population by Province, City, Municipality and Barangay. Philippine Statistics Authority. Retrieved 20 June 2016.{{cite encyclopedia}}: CS1 maint: numeric names: authors list (link)
  14. ^ Census of Population and Housing (2010). "Region XII (Soccsksargen)" (PDF). Total Population by Province, City, Municipality and Barangay. National Statistics Office. Retrieved 29 June 2016.{{cite encyclopedia}}: CS1 maint: numeric names: authors list (link)
  15. ^ Censuses of Population (1903–2007). "Region XII (Soccsksargen)". Table 1. Population Enumerated in Various Censuses by Province/Highly Urbanized City: 1903 to 2007. National Statistics Office.{{cite encyclopedia}}: CS1 maint: numeric names: authors list (link)
  16. ^ "Province of Sultan Kudarat". Municipality Population Data. Local Water Utilities Administration Research Division. Retrieved 17 December 2016.
  17. ^ "Poverty incidence (PI):". Philippine Statistics Authority. Retrieved December 28, 2020.
  18. ^ "Estimation of Local Poverty in the Philippines" (PDF). Philippine Statistics Authority. 29 November 2005.
  19. ^ "2003 City and Municipal Level Poverty Estimates" (PDF). Philippine Statistics Authority. 23 March 2009.
  20. ^ "City and Municipal Level Poverty Estimates; 2006 and 2009" (PDF). Philippine Statistics Authority. 3 August 2012.
  21. ^ "2012 Municipal and City Level Poverty Estimates" (PDF). Philippine Statistics Authority. 31 May 2016.
  22. ^ "Municipal and City Level Small Area Poverty Estimates; 2009, 2012 and 2015". Philippine Statistics Authority. 10 July 2019.
  23. ^ "PSA Releases the 2018 Municipal and City Level Poverty Estimates". Philippine Statistics Authority. 15 December 2021. Retrieved 22 January 2022.

External links[edit]