Holeylan County (Persian: شهرستان هلیلان) is in Ilam province, Iran.

Its capital is the city of Towhid,[2] whose population at the time of the 2016 National Census was 2,128 in 601 households.

[3] In 2018, Holeylan District was separated from Chardavol County[a] in the establishment of Holeylan County, which was divided into two districts of two rural districts each, with Towhid as its capital and only city.

[2] Holeylan County's administrative structure is shown in the following table.

Media related to Holeylan County at Wikimedia Commons