| Chashmasor | |
| Pushpin Map: | Tajikistan |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Tajikistan |
| Subdivision Type: | Country |
| Subdivision Name: |  Tajikistan |
| Subdivision Type1: | Region |
| Subdivision Name1: | Sughd Region |
| Subdivision Type2: | District |
| Subdivision Name2: | Ghafurov District |
| Population As Of: | 2015 |
| Population Total: | 10275 |
| Timezone: | TJT |
| Utc Offset: | +5 |
| Coordinates: | 40.4333°N 105°W |
Chashmasor (Tajik: Чашмасор, formerly Utkansoy) is a jamoat in north-west Tajikistan. It is located in Ghafurov District in Sughd Region. The jamoat has a total population of 10,275 (2015).[1] It consists of 28 villages, including Mirzorabot (the seat) and Kuhsor.[2]