POLITICAL SUBDIVISION
The town of Sierra Bullones has 22 barangays with their corresponding population:
| Name of Barangay | Population | |
| 1. | Abachanan | 2,435 |
| 2. | Anibongan | 767 |
| 3. | Bugsoc | 2,138 |
| 4. | Canlangit | 1,547 |
| 5. | Canta-ub | 341 |
| 6. | Casilay | 411 |
| 7. | Danicop | 1,052 |
| 8. | Dusita | 600 |
| 9. | Cahayag | 476 |
| 10. | La Union | 700 |
| 11. | Lataban | 534 |
| 12. | Magsaysay | 681 |
| 13. | Matin-ao | 1,504 |
| 14. | Nan-od | 1,060 |
| 15. | Poblacion | 3,011 |
| 16. | Salvador | 1,803 |
| 17. | San Agustin | 1,210 |
| 18. | San Isidro | 1,588 |
| 19. | San Jose | 943 |
| 20. | San Juan | 960 |
| 21. | Sta. Cruz | 1,012 |
| 22. | Villa Garcia | 1,883 |
The total Population of the 22 barangays of Sierra Bullones is 27,038.