Siah Rud is a city in East Azerbaijan Province, Iran.
Siah Rud or Siyahrud or Siahrud () may also refer to: Siah Varud, Gilan province Shafa Rud, Gilan province Siah Rud Poshteh, Gilan province Siah Rud, Mazandaran Siyahvarud, Zanjan Siah Rud District, in East Azerbaijan Province Siyahrud Rural District (disambiguation)