索梅什河是罗马尼亚和匈牙利的河流，属于蒂萨河的左支流，河道全长418公里，流域面积15,015平方公里，发源自代日，平均流量每秒114立方米。

The Someș (Romanian pronunciation: [ˈsomeʃ]; Hungarian: Szamos; German: Somesch or Samosch), located in northwestern Romania, is a left tributary of the Tisza in Hungary. It has a length of over 465 km, of which 376 km are in Romania. The Someș is the fifth river as length and debit in Romania. The hydrographic basin forms by the confluence at Mica, a commune about 4 km upstream of Dej, of Someșul Mare and Someșul Mic rivers. Someșul Mic (formed by the confluence of Someșul Rece with Someșul Cald) originates in the Apuseni Mountains, and Someșul Mare springs from the Rodna Mountains.