Bayandalai (Mongolian: Баяндалай) is a sum (district) of Ömnögovi Province in southern Mongolia.
| Sums of Ömnögovi | |
|---|---|
| Bayan-Ovoo | Bayandalai | Bulgan | Dalanzadgad | Gurvan tes | Khanbogd | Khan khongor | Khürmen | Mandal-Ovoo | Manlai | Nomgon | Noyon | Sevrei | Tsogt-Ovoo | Tsogttsetsii | |


