Kuhistoni Mastchoh District
Kuhistoni Mastchoh District 
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Location of Kuhistoni Mastchoh District in Tajikistan  | |
| Coordinates: 39°25′N 69°35′E / 39.417°N 69.583°E | |
| Country | Tajikistan | 
| Region | Sughd Region | 
| Capital | Mehron | 
| Area | |
 • Total  | 3,700 km2 (1,400 sq mi) | 
| Population  (2020)  | |
 • Total  | 25,400 | 
| • Density | 6.9/km2 (18/sq mi) | 
| Time zone | UTC+5 (TJT) | 
Kuhistoni Mastchoh District or Nohiya-i Kuhistoni Mastchoh (Tajik: Ноҳияи Кӯҳистони Мастчоҳ), also known as the Gorno-Matchinsky Region (Russian: Горно-Матчинский район) is a district in Sughd Region, Tajikistan. The capital of district is the village of Mehron. The population of the district is 25,400 (January 2020 estimate).