Kahak Rural District (Persian: دهستان كهك) is in the Central District of Kahak County, Qom province, Iran. Its capital is the village of Verjan.

At the National Census of 2006, its population (as a part of the former Nofel Loshato District of Qom County) was 9,590 in 2,696 households. There were 9,813 inhabitants in 2,935 households at the following census of 2011. At the most recent census of 2016, the population of the rural district was 12,269 in 3,826 households. The most populous of its 10 villages was Kermejegan, with 3,082 people.

After the census, the district was separated from the county in the establishment of Kahak County, which was divided into two districts of two rural districts each, with Kahak as its capital and only city.