Siah Sang or Siyah Sang (, "Blackstone") may refer to:

Siah Sang, Fariman, Razavi Khorasan Province Siah Sang, Zaveh, Razavi Khorasan Province Siah Sang-e Jadid, Tehran Province Tepe Maranjan, a hill in Kabul, Afghanistan

See also Blackstone and Black Stone (disambiguation) Blackrock and Black Rock (disambiguation)