| Municipality | San Sebastian | Profile | Overview |
| Category | Sixth Class Municipality | Ranking | 2017-2024 |
| Region | REGION VIII (Eastern Visayas) | Province | Samar (Western Samar) |
| Mayor | ENDI GAVIOLA | Population | 8,704 |
| Website Link | https://web.facebook.com/sansebastian.samar.5 | LGU | eleuteriomabao@yahoo.com |
| Address | Brgy. Poblacion 3, San Sebastian, Samar | Contact Nos. | Tel: 09175009597 |