| Šešuvis | |
| Mouth Coordinates: | 55.2181°N 22.2536°W |
| Progression: | Jūra→ |
| Subdivision Type1: | Country |
| Length: | 115km (71miles) |
| Discharge1 Avg: | 16.4m3/s |
| Basin Size: | 1916km2 |
The Šešuvis is a river in western Lithuania and the main tributary of the Jūra River.[1] The Šešuvis begins 12km (07miles) northwest of Raseiniai and flows mostly in a southwesterly direction. Its main tributaries are the Ančia, Šaltuona, Agluona, Žalpė, and Įkojis rivers. There are almost no lakes in Šešuvis' basin; therefore, its water level is subject to great seasonal fluctuations.[2]