|Time zone||IRST (UTC+3:30)|
|• Summer (DST)||IRDT (UTC+4:30)|
Naqadeh (Persian: نقده; also known as Nagadeh, Naghadeh, Naghdeh, and Nākhuda; formerly known as Suldüz (Persian: سولدوز), also Romanized as Sulduz, Solduz and Suldoz) is a city in and the capital of Naqadeh County, West Azerbaijan Province, Iran. At the 1996 census, its population was 110,257, in 20,781 families.
The city is located in the Gadar River valley, 23 kilometres (14 mi) south of Lake Urmia at an elevation of 1,300 metres (4,300 ft) above sea-level. The region's economy is based around agriculture, particularly the production of fruit, grain, and timber. Naqadeh is nicknamed as the Sulduz city of Azerbaijan. In Turkish Sulduz means plain water (i.e. a plain with water), this name because of the geographical situation of the city was chosen by ancient Turks who live there.
The town is inhabited mainly by the Turkic Qarapapaq confederacy (made up of the tribes of Ayrumlu, Ojaq and Afshar, who were resettled from the Caucasus into Persia/Iran after the loss of Georgia, Azerbaijan, Dagestan, and Armenia to Russia following the first and second Russo-Persian Wars of the 19th century), with a Kurdish minority. Until the genocides of World War One, the town was once home to a large number of Assyrians who perished during the Assyrian Genocide. The main religion is Shia Islam 
Naqadeh has several cultural and recreational attractions like "Yeddi göz" and "Sultan Yaghoob". The most important worth seeing and historical places of the city are as follows:
- Important archaeological sites in the vicinity of Naqadeh include Teppe Hasanlu, 12 kilometres (7.5 mi) northwest of Naqadeh and famous for its "Golden Cup", and Hajji Firuz Tepe where some of the oldest evidence for winemaking has been uncovered.
- Mannae and Urartu historical inscriptions in south-west to Lake Urmia.
- Several wetlands (Yadegarloo, Hassanlu and Sulduz wetlands).
- Zendan and Baha Hasan caves.
- tepe bashi central and old park of the city that has big history and american researchers believe there is a big castle under ground of it.
- Qal'a Paswe is a very small village near Naqadeh whose name according to the Iranist Vladimir Minorsky has kept the memory of the Iranian settlements from the 9th century BCE and reminds of the "Parswa tribes" mentioned in the records of the Assyrian ruler Shalmaneser III (reign 858-824 BCE).
More than 65 percent of population of city speak in Azeri Turkish, remaining less than 35 percent speak in Kurdish (most Kurdish population are living in the villages, which are near to Mahabad, Piranshahr and Oshnaviyeh). 
The regional economy greatly depends on agricultural products, and cattle and sheep are raised both for meat and for wool. Some of this production is exported. The region's farmers also raise apples, grapes, tomatoes, potatoes, onions, peas, and other fruits. The high farm production results from the fertile soil and the use of modern machinery and scientific farming methods.
- Naqadeh can be found at GEOnet Names Server, at this link, by opening the Advanced Search box, entering "-3076454" in the "Unique Feature Id" form, and clicking on "Search Database".
- Familiar Faces in Unfamiliar Places:Assyrians in the California Heartland 1911 - 2010, Arianne Ishaya
- page 78 of Minorsky, V. (1957), "Mongol Place-Names in Mukri Kurdistan (Mongolica, 4)", Bulletin of the School of Oriental and African Studies, University of London 19 (1): 58–81, doi:10.1017/s0041977x00119202, ISSN 0041-977X
- اطلس گیتاشناسی استانهای ایران [Atlas Gitashenasi Ostanhai Iran] (Gitashenasi Province Atlas of Iran)