Sai River

Sai River may refer to:


 * Sai River (Gujarat), a river in Gujarat, India
 * Sai River (Uttar Pradesh), a tributary of the River Gomti in Uttar Pradesh, India
 * Sai River (Gifu), a river in Gifu Prefecture, Japan
 * Sai River (Ishikawa), a river near Kanazawa in Ishikawa Prefecture, Japan
 * Sâi, a tributary of the Danube in Romania
 * Sai River (Thailand), a river that forms the border between Thailand and Burma