Atan, IranAtan is a village in Alamut-e Pain Rural District of Rudbar-e Alamut-e Sharqi District in Qazvin County, Qazvin province, Iran.DemographicsPopulationAt the time of the 2006 National Census, the village's population was 316 in 111 households. The following census in 2011 counted 248 people in 102 households. The 2016 census measured the population of the village as 379 people in 148 households. It was the most populous village in its rural district.