Hajji Kola () is a village in Gatab-e Shomali Rural District of Gatab District in Babol County, Mazandaran province, Iran.
At the time of the 2006 National Census, the village's population was 1,128 in 291 households. The following census in 2011 counted 1,285 people in 383 households. The 2016 census measured the population of the village as 1,336 people in 433 households.