Khorramdasht District () is in Takestan County, Qazvin province, Iran. Its capital is the city of Khorramdasht.
At the time of the 2006 National Census, the district's population was 21,685 in 5,601 households. The following census in 2011 counted 21,910 people in 6,393 households. The 2016 census measured the population of the district as 20,661 inhabitants in 6,520 households.