:Bak District

{{Short description|District in Afghanistan}}

File:Khost_districts.png in the north, below Zazi Maidan District.]]

{{for|other places|Bak (disambiguation)}}

Bäk District ({{langx|ps|باک ولسوالۍ}}, {{langx|fa|ولسوالی باک}}) is in the northern part of Khost Province, Afghanistan. It borders Tere Zayi District to the south, Sabari District to the west, Zazi Maydan District to the north, and Khyber Pakhtunkhwa in Pakistan to the east. According to Afghanistan's National Statistics and Information Authority (NSIA) the 2020 estimated population of the district was 24,977 people.{{cite web |url=https://www.nsia.gov.af:8080/wp-content/uploads/2020/06/%D8%A8%D8%B1%D8%A2%D9%88%D8%B1%D8%AF-%D9%86%D9%81%D9%88%D8%B3-%DA%A9%D8%B4%D9%88%D8%B1-%DB%B1%DB%B3%DB%B9%DB%B9-%D9%86%D8%B3%D8%AE%DB%80-%D8%A7%D9%88%D9%84.pdf |title=Estimated Population of Afghanistan 2020-21 |publisher=www.nsia.gov.af |work=National Statistics and Information Authority (NSIA) |format=PDF |page=23 |access-date=2021-03-24 |archive-date=2020-07-03 |archive-url=https://web.archive.org/web/20200703171906/https://www.nsia.gov.af:8080/wp-content/uploads/2020/06/%D8%A8%D8%B1%D8%A2%D9%88%D8%B1%D8%AF-%D9%86%D9%81%D9%88%D8%B3-%DA%A9%D8%B4%D9%88%D8%B1-%DB%B1%DB%B3%DB%B9%DB%B9-%D9%86%D8%B3%D8%AE%DB%80-%D8%A7%D9%88%D9%84.pdf |url-status=dead }} The district center is the village of Bäk, in the southern part near the border with Tere Zayi District.