Dalahu County (Persian: شهرستان دالاهو)[a] is in Kermanshah province, Iran.

Dalahu was separated from Eslamabad-e Gharb County in 2004.

[6] The 2016 census measured the population of the county as 35,987 in 10,266 households.

[2] Dalahu County's population history and administrative structure over three consecutive censuses are shown in the following table.

Media related to Dalahu County at Wikimedia Commons