Zarnaq (Persian: زرنق)[a] is a city in the Central District of Heris County, East Azerbaijan province, Iran.

[5] According to the oral tradition of the people, the ancestor of the old clans of the city was a Kipchak nobleman named Qarabey who moved there from Cumania.

This city consists of several clans of the Shahsevans who settled there during the Safavid era and the Kipchak Turks (Qarabey's descendants) who lived there much earlier.

[citation needed] At the time of the 2006 National Census, the city's population was 4,766 in 1,132 households.

[6] Seyyid Qasim, a holy spiritual figure in the region, descendant of the Prophet of Islam, and mystic (not originally from Zarnaq, but he had long stays there).