Sesia
| Sesia | |
|---|---|
| The river in the upper Valsesia | |
| Location of the Sesia in Italy | |
| Location | |
| Country | Italy | 
| Physical characteristics | |
| Source | |
| • location | Alagna Valsesia | 
| • elevation | 4,500 m (14,800 ft) | 
| Mouth | Po | 
|  • coordinates | 45°07′59″N 8°34′24″E / 45.13306°N 8.57333°E | 
| Length | 139.6 km (86.7 mi) | 
| Basin size | 3,037.6 km2 (1,172.8 sq mi) | 
| Discharge | |
| • average | (mouth) 70.4 m3/s (2,490 cu ft/s) | 
| Basin features | |
| Progression | Po→ Adriatic Sea | 
| Tributaries | |
| • left | Sermenza, Mastallone, Pascone, Strona di Valduggia. | 
| • right | Otro, Vogna, Artogna, Sorba, rio di Valmala, Sessera, Cervo, Naviglio di Ivrea (artificial canal), Bona, Marcova | 
The Sesia (Latin Sesites or Sessites) is a river in Piedmont, north-western Italy, tributary to the Po.