Zarnan (Persian: زرنان, also romanized as Zarnān; also known as Zarnān-e Bālā, Qal‘eh-ye Bālā Zarnān, and Zard Āb) is a village in Danesh Rural District, in the Central District of Qods County, Tehran Province, Iran. At the 2006 census, its population was 562, in 155 families.