| Official Name: | Dede-Ichyotuy |
| Native Name: | Дэдэ-Ичётуй |
| Native Name Lang: | ru |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Buryatia#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Type1: | Region |
| Subdivision Name1: | Republic of Buryatia |
| Subdivision Type2: | County |
| Subdivision Type3: | District |
| Subdivision Name3: | Dzhidinsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +8:00 |
| Coordinates: | 50.7333°N 130°W[1] |
Dede-Ichyotuy (Russian: Дэдэ-Ичётуй; Buriat: Дээдэ Үшөөтэй, Deede Üshöötei) is a rural locality (a selo) in Dzhidinsky District, Republic of Buryatia, Russia. The population was 1,054 as of 2017.[2] There are 41 streets.
Dede-Ichyotuy is located 22 km northeast of Petropavlovka (the district's administrative centre) by road. Tsagatuy and Petropavlovka are the nearest rural localities.[3]