KasinKasin is a village in Ozomdel-e Jonubi Rural District of the Central District in Varzaqan County, East Azerbaijan province, Iran.DemographicsPopulationAt the time of the 2006 National Census, the village's population was 1,917 in 430 households. The following census in 2011 counted 2,178 people in 552 households. The 2016 census measured the population of the village as 2,780 people in 840 households. It was the most populous village in its rural district.