Dimdim Castle (Kurdish: Qelay Dimdim قەڵای دمدم, Persian: دم دم, Demdem or Domdom) 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 the pre-Islamic period. It was rebuilt by the Amir Khan Lepzerin in 1609.