| Official Name: | Ruyi Du Ab |
| Native Name: | روی دوآب |
| Settlement Type: | District |
| Pushpin Map: | Afghanistan |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Afghanistan |
| Subdivision Type: | Country |
| Subdivision Name: |  Afghanistan |
| Subdivision Type1: | Province |
| Subdivision Name1: | Samangan Province |
| Unit Pref: | Imperial |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Timezone: | + 4.30 |
Ruyi Du Ab District is a district in Samangan Province, northern Afghanistan. The estimated population in 2019 was 50,661.[1]