Salah ol Din Kola () is a village in Baladeh Kojur Rural District of the Central District in Nowshahr County, Mazandaran province, Iran.
At the time of the 2006 National Census, the village's population was 2,370 in 612 households. The following census in 2011 counted 2,401 people in 727 households. The 2016 census measured the population of the village as 2,593 people in 837 households. It was the most populous village in its rural district.