| Settlement Type: | District |
| Mapsize: | 250px |
| Subdivision Type: | Country |
| Subdivision Name: |  Afghanistan |
| Subdivision Type1: | Province |
| Subdivision Name1: | Nangarhar Province |
| Subdivision Type2: | Capital |
| Subdivision Name2: | Sra Kala |
| Subdivision Type3: | Governor |
| Subdivision Name3: | Haji Ghaleb Mujahed |
| Population As Of: | 2006[1] |
| Population Total: | 95,468 |
| Timezone1: | D† (Afghanistan Standard Time) |
| Utc Offset1: | +4:30 |
| Demographics1 Title1: | Main language(s) |
| Demographics1 Info1: | Pashto, Dari |
Achin (Pushto; Pashto: اچين ولسوالۍ) is a district in southern Nangarhar Province, Afghanistan, on the border with Pakistan.
Its population is 100% Pashtun.[2] Achin is home to the Shinwari tribe, one of the largest Pashtun tribes.
It was a stronghold of the Mujaheddin during the Soviet occupation of Afghanistan in the 1980s.
During the April 2017 Nangarhar airstrike, the United States Air Force dropped a MOAB in Achin district which targeted a tunnel complex of the ISIS-affiliate located in the area,[3] and reportedly killed dozens of militants.[4]
The primary licit crop in Achin is wheat. Collecting and selling firewood, and manual labor, are other income-generating activities.[2] Tobacco is also grown in the district.[5]
In 2000, UNDCP recorded 130 poppy-growing villages in Achin, making it the greatest opium growing district in eastern Afghanistan that year.[6]