| Kuf Ab | |
| Native Name: | کوفآب |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name: |  Afghanistan |
| Subdivision Name1: | Badakhshan |
| Subdivision Type2: | Region |
| Subdivision Name2: | Darwaz/Khwahan |
| Subdivision Type3: | Capital |
| Subdivision Name3: | Qal`eh-ye Kuf |
| Population As Of: | 2012 |
| Population Total: | 21,400 |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Timezone: | + 4.30 |
| Coordinates: | 38.0411°N 70.4786°W |
Kuf Ab is one of the 28 districts of Badakhshan province in eastern Afghanistan. It was created in 2005 from part of Khwahan and is home to approximately 21,400 residents.This district borders with the Districts Khwahan, Shekay, Nusay, Maimay, Raghistan, and with the Tajik district of Darvoz Gorno-Badakhshan Autonomous Province, 
Tajikistan.
The capital of the district is the village of Qal`eh-ye Kuf.
A Russian plane crashed here in 2024. (Badakhshan Dassault Falcon 10 crash).