Karandaq (Persian: كرندق) is a village in Sanjabad-e Shomali Rural District of the Central District of Kowsar County, Ardabil province, Iran.

At the 2006 census, its population was 801 in 167 households. The following census in 2011 counted 816 people in 217 households. The latest census in 2016 showed a population of 502 people in 146 households. It was the most populous village in its rural district.