| Böyükdüz | |
| Settlement Type: | Municipality |
| Pushpin Map: | Azerbaijan |
| Pushpin Mapsize: | 300 |
| Subdivision Type: | Country |
| Subdivision Name: |  Azerbaijan |
| Subdivision Type1: | Autonomous republic |
| Subdivision Name1: | Nakhchivan |
| Subdivision Type2: | District |
| Subdivision Name2: | Kangarli |
| Population Total: | 1435 |
| Timezone: | AZT |
| Utc Offset: | +4 |
| Coordinates: | 39.2806°N 45.2356°W |
Böyükdüz (also, Böyük Düz and Bëyuk-Dyuz) is a village and municipality in the Kangarli District of Nakhchivan, Azerbaijan. It has a population of 1,435.