Uulbayan (Mongolian: Уулбаян) is a sum (district) of Sükhbaatar Province in eastern Mongolia.
| Sums of Sükhbaatar | |
|---|---|
| Asgat | Baruun-Urt | Bayandelger | Dariganga | Erdenetsagaan | Khalzan | Mönkhkhaan | Naran | Ongon | Sükhbaatar | Tüvshinshiree | Tümentsogt | Uulbayan | |


