| En Name: | Bayanday |
| Ru Name: | Баяндай |
| Coordinates: | 53.0567°N 105.5258°W |
| Map Label Position: | right |
| Federal Subject: | Irkutsk Oblast |
| Adm District Jur: | Bayandayevsky District |
| Inhabloc Cat: | Rural locality = |
| Inhabloc Type: | Village = |
Bayanday (ru|Баяндай) is a rural locality (a selo) and the administrative center of Bayandayevsky District of Ust-Orda Buryat Okrug, Irkutsk Oblast, Russia. Population: