Aleosan
Aleosan is a municipality in Cotabato province in the Philippines, established in 1982 after separating from Pikit.
Last updated August 25, 2026
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Overview
Aleosan, officially the Municipality of Aleosan, is a local government municipality in Cotabato province on the island of Mindanao in the Philippines. Its municipal government is based in Barangay San Mateo, and the municipality is situated within a transport corridor connecting areas of Maguindanao, Cotabato and Davao del Sur. It is bordered by Midsayap to the west, Libungan to the north, and Pikit to the east and south. The name Aleosan was formed from the names of three municipalities in Iloilo—Alimodian, Leon and San Miguel—which were associated with many of the early Christian settlers in northern Pikit, the municipality from which Aleosan was created. The municipality was established through Batas Pambansa Blg. 206, approved on March 25, 1982. The legislation originated as Parliamentary Bill No. 670, authored by Assemblyman Jesus P. Amparo and co-authored by Blah T. Sinsuat, Ernesto F. Roldan and Tomas B. Baga Jr. The proposed municipality was initially referred to as O. Romualdez. Its creation separated 19 barangays from Pikit, with San Mateo designated as the seat of government. A ratification plebiscite was held on May 17, 1982, alongside the barangay elections. Aleosan is divided into 17 barangays. Its geography and intermediate climate, characterized by rainfall distributed throughout the year rather than a distinct dry season, support both seasonal and permanent agricultural production. Important crops and agricultural materials include rice, corn, mangoes, jackfruit, vegetables, root crops, coconut, rubber, coffee, cacao and bananas. The municipality also has livestock-production potential and is described as one of the province's significant livestock suppliers. Local economic activity includes small-scale enterprises and agricultural processing. The municipality has abundant raw materials for processing, although some enterprises have faced inadequate capital, unreliable supplies and quality problems. A cassava-processing facility reportedly ceased operations because of insufficient raw-material supply and low starch quality. Mango production is identified as an area with potential for further development, while coconut, banana, rubber and coffee offer additional opportunities for value-added agriculture. Aleosan's territorial relationship with the Bangsamoro region has changed since the 2019 plebiscite on regional inclusion. Dunguan and Tapodoc were among Cotabato's barangays that voted affirmatively to join the Bangsamoro's Special Geographic Area. In 2023, the Bangsamoro Parliament approved new municipalities in that area. Following a plebiscite held on April 13, 2024, Dunguan became part of Nabalawag and Tapodoc became part of Tugunan, reducing their administrative connection with Aleosan. The municipality also promotes nature- and landscape-based attractions. Locations identified for tourism include mountain-climbing opportunities in Barangay Malapang, ecotourism in Barangay Pentil, UK Peak in Barangay Katalicanan, and sunset views at Lindungan. According to the 2024 census, Aleosan had 38,023 residents. It remains an active Philippine municipality whose public role centers on local administration, agricultural development, infrastructure and community services rather than commercial brand operations.
History
Aleosan developed from the northern portion of Pikit in Cotabato province. The municipality's name is an acronym derived from Alimodian, Leon and San Miguel, three municipalities in Iloilo associated with many of the early Christian inhabitants who settled in the area. The name therefore reflects the geographic origins of an important part of the early settler population rather than a commercial founder or private organization. The legal process for creating Aleosan began with Parliamentary Bill No. 670. Assemblyman Jesus P. Amparo authored the proposal, with Blah T. Sinsuat, Ernesto F. Roldan and Tomas B. Baga Jr. as co-authors. The proposal initially used the name O. Romualdez. It was ultimately enacted as Batas Pambansa Blg. 206 on March 25, 1982. The law organized a new municipality from 19 barangays formerly belonging to Pikit and designated San Mateo as the municipal seat. Residents ratified the creation in a plebiscite conducted on May 17, 1982, on the same date as the barangay elections. Aleosan's administrative identity is tied to its location in Cotabato's agricultural belt. The municipality lies about 65 kilometers from Amas, the provincial capital, and is connected by road to the wider transport network running from Cotabato City through Maguindanao and Cotabato toward Kidapawan and Davao City. It is bounded by Midsayap, Libungan and Pikit, and its local settlements are organized into 17 barangays. The municipality has an intermediate climate with no pronounced dry season. Rainfall is spread across the year, with heavier precipitation generally occurring from May through September. These conditions support a mixed agricultural base. Seasonal crops include rice, corn, mangoes, jackfruit, vegetables and root crops, while coconut, rubber, coffee, cacao and orchard crops are longer-term production areas. Livestock is another important economic activity, and Aleosan is described as having substantial potential and a role as a provincial livestock supplier. Local development has included efforts to process agricultural commodities, but the scale of industry remains limited. Small enterprises have faced financing constraints, and a cassava-processing plant closed after difficulties securing sufficient raw materials and producing starch of adequate quality. Mango cultivation is identified as a particularly promising sector, with opportunities to expand production and develop processing or other value-added activities. Coconut, banana, rubber and coffee are also potential sources of agricultural income. Aleosan's political geography changed through the Bangsamoro peace and autonomy process. In the February 6, 2019 plebiscite, Dunguan and Tapodoc were among Cotabato barangays that voted to join the Bangsamoro's Special Geographic Area. They had previously voted unsuccessfully for inclusion in the Autonomous Region in Muslim Mindanao in 2001. The Bangsamoro Parliament later enacted measures creating new municipalities in the Special Geographic Area. After a plebiscite ratified on April 13, 2024, Dunguan was assigned to Nabalawag and Tapodoc to Tugunan. Alongside agriculture and public administration, Aleosan identifies tourism possibilities based on its terrain and views. Malapang is associated with mountain climbing, Pentil with ecotourism, Katalicanan with UK Peak and Lindungan with sunset viewing. The municipality recorded a population of 38,023 in the 2024 census. Its contemporary profile is that of an active local government unit focused on agricultural livelihoods, municipal services, territorial administration and gradual diversification into tourism and processing.
- 2024
Territorial reassignment follows Bangsamoro plebiscite
[1]Following ratification on April 13, Dunguan and Tapodoc became parts of Nabalawag and Tugunan respectively.
- 2024
Population reaches 38,023
[1]The 2024 census recorded 38,023 residents in Aleosan.
- 2019
Two barangays vote for Bangsamoro inclusion
[1]Dunguan and Tapodoc voted affirmatively to become part of the Bangsamoro Special Geographic Area.
- 1982
Aleosan is created from Pikit
[1]Batas Pambansa Blg. 206 established Aleosan as a new municipality from 19 barangays of Pikit, with San Mateo as its seat of government.
- 1982
Creation is ratified by plebiscite
[1]A plebiscite ratifying the municipality's creation was held on May 17, 1982.
Products and positioning
A rural agricultural municipality in Cotabato with an economy centered on crop production, livestock, local processing and emerging ecotourism.
Agriculture
Agricultural crops
Aleosan's agricultural base includes rice, corn, mangoes, jackfruit, vegetables and root crops. The municipality's year-round rainfall pattern supports both seasonal cultivation and longer-term farm development. Mango production is identified as a particularly promising area for expansion and value-added activity.
Agriculture
Permanent and industrial crops
Coconut, rubber, coffee, cacao, bananas and orchard crops form part of Aleosan's longer-term agricultural and raw-material base. These commodities provide potential inputs for local processing and rural enterprise, although the municipality's processing sector has faced capital and supply constraints.
Agriculture
Livestock production
Livestock is an important local economic activity. Aleosan is described as having strong potential in the sector and as being among the province's livestock producers and suppliers.
Tourism
Nature-based tourism
Municipal tourism sites include mountain-climbing areas in Barangay Malapang, ecotourism opportunities in Barangay Pentil, UK Peak in Barangay Katalicanan and sunset-viewing scenery at Lindungan.
Recent events
- 2024
Dunguan and Tapodoc are reassigned to newly created Bangsamoro municipalities[1]
Regulation · Other
After the ratification of a plebiscite on April 13, 2024, Dunguan became part of Nabalawag and Tapodoc became part of Tugunan under Bangsamoro autonomy legislation.
- 2019
Aleosan barangays vote on inclusion in the Bangsamoro Special Geographic Area[1]
Regulation · Other
Dunguan and Tapodoc were among Cotabato barangays that voted affirmatively in the plebiscite on joining the Bangsamoro's Special Geographic Area.
- 1982
Aleosan is established as a municipality separate from Pikit[1]
Other
Batas Pambansa Blg. 206 created Aleosan after separating 19 barangays from Pikit. San Mateo became the seat of the new municipal government, and the creation was ratified in a plebiscite held on May 17.
Sources2 sources
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