| Oksna | |
| Source1 Location: | Hrodna Region |
| Mouth: | Vilija |
| Mouth Coordinates: | 54.5068°N 26.4413°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Belarus |
| Length: | 20km (10miles) |
| Basin Size: | 104km2 |
Oksna (Belarusan: Оксна, Oksna) is a river in Belarus, the left tributary of the Vilija River (Neman Basin). It flows in the Smarhoń district of the Grodno Region. The length is 20 km. The catchment area is 104 km2. The average slope of the water surface is 4.8 ‰. The main tributary is the Hiarviatka River.
It begins near the village of Hlinny, flows through the Ašmiany upland, through the city of Smarhoń, and flows into the Vilija northwest of the village of Pieravozy.[1]