Naqadeh, formerly known as Sulduz, is a city in the Central District of Naqadeh County, West Azerbaijan province, Iran, serving as capital of both the county and the district.

The Republic of Mahabad, also referred to as the Republic of Kurdistan, was a short-lived Kurdish self-governing unrecognized state in present-day Iran, from 22 January to 15 December 1946. The Republic of Mahabad, a puppet state of the Soviet Union, arose alongside the Azerbaijan People's Government, a similarly short-lived unrecognized Soviet puppet state.