Siasi
| Siasi سِئَسِ | |
|---|---|
| Municipality of Siasi | |
| Map of Sulu with Siasi highlighted | |
| OpenStreetMap | |
| Location within the Philippines | |
| Coordinates: 5°32′46″N 120°48′52″E / 5.5462°N 120.8145°E | |
| Country | Philippines | 
| Region | Zamboanga Peninsula | 
| Province | Sulu | 
| District | 2nd district | 
| Established | February 11, 1904 | 
| Barangays | 50 (see Barangays) | 
| Government | |
| • Type | Sangguniang Bayan | 
| • Mayor | Ben-Sayeed M. Muksan | 
| • Vice Mayor | Arnashrif M. Muksan | 
| • Representative | Munir Napii Arbison Jr. | 
| • Municipal Council | Members | 
| • Electorate | 33,415 voters (2025) | 
| Area | |
|  • Total | 192.87 km2 (74.47 sq mi) | 
| Elevation | 52 m (171 ft) | 
| Highest elevation | 490 m (1,610 ft) | 
| Lowest elevation | 0 m (0 ft) | 
| Population  (2020 census) | |
|  • Total | 81,689 | 
| • Density | 420/km2 (1,100/sq mi) | 
| • Households | 14,464 | 
| Economy | |
| • Income class | 2nd municipal income class | 
| • Poverty incidence | 54.06 | 
| • Revenue | ₱ 300.1 million (2022) | 
| • Assets | ₱ 491.1 million (2022) | 
| • Expenditure | ₱ 243.9 million (2022) | 
| • Liabilities | ₱ 242 million (2022) | 
| Service provider | |
| • Electricity SIASI ELECTRIC COOPERATIVE (SIASELCO) | Sulu Electric Cooperative (SULECO) | 
| Time zone | UTC+8 (PST) | 
| ZIP code | 7412 | 
| PSGC | |
| IDD : area code | +63 (0)68 | 
| Native languages | Tausug Tagalog | 
| Website | www | 
Siasi, officially the Municipality of Siasi (Tausūg: Kawman sin Siasi; Filipino: Bayan ng Siasi), is a municipality in the province of Sulu, Philippines. According to the 2020 census, it has a population of 81,689 people.