Qarah Aqaj-e Pain (Persian: قره اقاج پائين, also Romanized as Qarah Āqāj-e Pā’īn and Qarah Āghāj-e Pā’īn) is a village in Atrak Rural District, Maneh District, Maneh and Samalqan County, North Khorasan Province, Iran. At the 2006 census, its population was 91, in 23 families.