Kamal ol Din Poshteh () is a neighborhood in the city of Chaf and Chamkhaleh in the Central District of Langarud County, Gilan province, Iran.
At the time of the 2006 National Census, Kamal ol Din Poshteh's population was 202 in 61 households, when it was a village in Gel-e Sefid Rural District.
In 2009, the village of Chaf-e Pain merged with the villages of Chaf-e Bala, Chamkhaleh, Galesh Kolam, Hoseynabad-e Chaf, Kamal ol Din Poshteh, Mian Mahalleh-ye Pap Kiadeh, Pain Pap Kiadeh, Palat Kaleh, Pir Poshteh, Radar Kumeh, Soltan Moradi, Tappeh, and Tazehabad-e Chaf to become the city of Chaf and Chamkhaleh.