| Sounio | |
| Name Local: | Σούνιο |
| Type: | community |
| Coordinates: | 41.13°N 25.043°W |
| Periph: | Eastern Macedonia and Thrace |
| Periphunit: | Xanthi |
| Municipality: | Abdera |
| Municunit: | Vistonida |
| Population As Of: | 2021 |
| Population: | 924 |
Sounio (el|Σούνιο) is a settlement in the Vistonida municipal unit, Xanthi regional unit of Greece. According to the 2021 census, the population was 924 inhabitants.