NA-266 Killa Abdullah-cum-Chaman () is a constituency for the National Assembly of Pakistan.
General elections were held on 10 October 2002. Mahmood Khan Achakzai of Pakhtun-khwa Milli Awami Party won by 35,385 votes.
General elections were held on 18 February 2008. Haji Rozuddin of Muttahida Majlis-e-Amal won by 45,590 votes.
General elections were held on 11 May 2013. Mahmood Khan Achakzai of Pakhtun-khwa Milli Awami Party won by 37,814 and became the member of National Assembly.
General elections were held on 25 July 2018.
General elections were held on 8 February 2024. Mahmood Khan Achakzai won the election with 67,530 votes.