| Official Name: | Masty District |
| Native Name: | |
| Flag Size: | 150 |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Belarus |
| Subdivision Type1: | Region |
| Subdivision Name1: | Grodno Region |
| Seat Type: | Administrative center |
| Seat: | Masty |
| Area Total Km2: | 1,342.04 |
| Population As Of: | 2024 |
| Population Footnotes: | [1] |
| Population Total: | 25,210 |
| Population Density Km2: | auto |
| Population Urban: | 14,447 |
| Population Rural: | 10,763 |
| Timezone: | MSK |
| Utc Offset: | +3 |
Masty District (Belarusian: Мастоўскі раён; Russian: Мостовский район) is a district (raion) of Grodno Region in Belarus. The administrative centre is Masty.[1] As of 2024, it has a population of 25,210.[1]