Sar KajSar Kaj is a village in Natel Kenar-e Olya Rural District of the Central District in Nur County, Mazandaran province, Iran.DemographicsPopulationAt the time of the 2006 National Census, the village's population was 583 in 125 households. The following census in 2011 counted 656 people in 176 households. The 2016 census measured the population of the village as 666 people in 198 households.