Darreh Namdari (, also Romanized as Darreh Nāmdārī) is a village in, and the capital of, Poshtkuh Rural District of Emamzadeh Hasan District, Falard County, Chaharmahal and Bakhtiari province, Iran.
At the 2006 census, its population was 338 in 66 households, when it was in the former Falard District of Lordegan County. The following census in 2011 counted 395 people in 91 households. The latest census in 2016 showed a population of 439 people in 116 households. The village is populated by Lurs.
Falard District was separated from the county in 2022 and became Falard County, with two districts and Mal-e Khalifeh as its capital.