| São Sebastião do Tocantins | |
| Settlement Type: | Municipality |
| Official Name: | The Municipality of São Sebastião do Tocantins |
| Mapsize: | 250px |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name: |  Brazil |
| Subdivision Name1: | North |
| Subdivision Name2: | Tocantins |
| Leader Title: | Mayor |
| Leader Name: | Vilmede Alves de Sousa (PPS) |
| Established Title: | Founded |
| Area Total Km2: | 287.271 |
| Population As Of: | 2020 [1] |
| Population Total: | 4,852 |
| Population Density Km2: | 15.8 |
| Timezone: | BRT |
| Utc Offset: | -3 |
| Coordinates: | -5.2569°N -48.2°W |
| Elevation M: | 105 |
| Blank Name: | HDI (2000) |
| Blank Info: | 0.610 – medium[2] |
São Sebastião do Tocantins is the northernmost city in the state of Tocantins.