Calanasan
| Calanasan Bayag | |
|---|---|
| Municipality of Calanasan | |
| Municipal Hall (Balay daya Ymandaya Bldg.) | |
| Map of Apayao with Calanasan highlighted | |
| OpenStreetMap OpenStreetMap | |
| Location in the Philippines | |
| Coordinates: 18°15′18″N 121°02′37″E / 18.255°N 121.0436°E | |
| Country | Philippines | 
| Region | Cordillera Administrative Region | 
| Province | Apayao | 
| District | Lone district | 
| Founded | June 25, 1963 | 
| Barangays | 18 (see Barangays) | 
| Government | |
| • Type | Sangguniang Bayan | 
| • Mayor | Shamir M. Bulut (NP) | 
| • Vice Mayor | Martin Lucero B. Lawat (NPC) | 
| • Representative | Eleanor Bulut-Begtang | 
| • Municipal Council | Members | 
| • Electorate | 9,061 voters (2025) | 
| Area | |
|  • Total | 1,256.15 km2 (485.00 sq mi) | 
| Elevation | 554 m (1,818 ft) | 
| Highest elevation | 1,220 m (4,000 ft) | 
| Lowest elevation | 258 m (846 ft) | 
| Population  (2020 census) | |
|  • Total | 12,550 | 
| • Density | 10.0/km2 (26/sq mi) | 
| • Households | 2,607 | 
| Economy | |
| • Income class | 1st municipal income class | 
| • Poverty incidence | 27.38 | 
| • Revenue | ₱ 440 million (2022) | 
| • Assets | ₱ 965.2 million (2022) | 
| • Expenditure | ₱ 285.1 million (2022) | 
| • Liabilities | ₱ 102.5 million (2022) | 
| Service provider | |
| • Electricity | Kalinga - Apayao Electric Cooperative (KAELCO) | 
| Time zone | UTC+8 (PST) | 
| ZIP code | 3814 | 
| PSGC | |
| IDD : area code | +63 (0)74 | 
| Native languages | Isnag Ilocano Tagalog | 
Calanasan, officially the Municipality of Calanasan, (Isnag: Ili naya Calanasan; Ilocano: Ili ti Calanasan; Tagalog: Bayan ng Calanasan), (formerly known as Bayag, meaning "slow") is a municipality in the province of Apayao, Philippines. According to the 2020 census, it has a population of 12,550 people, making it the least populated municipality in the province.
Calanasan is the source of the Apayao River which empties into the South China Sea and is the only navigable river in Apayao.