Naqadeh (Persian: نقده; also Romanized as Nagadeh, Naghadeh, Naghdeh, and Nākhuda; formerly known as Sulduz (Persian: سولدوز), also Romanized as Solduz and Suldoz) is a city in and the capital of Naqadeh County, West Azerbaijan Province, Iran. At the 1982 census, its population was 72,975, in 18,320 families.