Kolijan Rostaq District () is in Sari County, Mazandaran province, Iran. Its capital is the city of Pain Hular.
At the time of the 2006 National Census, the district's population was 13,143 in 3,807 households. The following census in 2011 counted 11,732 people in 3,832 households. The 2016 census measured the population of the district as 12,024 inhabitants in 4,925 households.