Dimdim Castle (Persian: دم دم, Demdem or Domdom, Kurdish: Qelay Dimdim) was a Kurdish fortress located on top of Mount DimDim in West Azarbaijan Province of Iran, just west of Lake Urmia. The fortress dates from pre-Islamic period and in 1609 it was rebuilt by Kurdish leader Emir Xan Lepzêrin, ruler of Bradost.