The Ūla () is a river which starts in northern Belarus and flows into the Merkys river, in southern Lithuania. It flows in a generally northwesterly direction.
It starts as a confluence of two channeled rivers, Provozha (Провожа) and Luchka (Лучка) by the Padeyki village. From Luchka to Dubičiai it is known as Pelesa (Padzeyka in Belarus). Its total length is 84 km, of which 13,5 km are in Voranava District, Grodno Region, Belarus, 3 km are along the Belarus-Lithuania border, the rest is in Varėna District, Lithuania, of which part flows through the Ūla Landscape Reserve and then in the Dzūkija National Park. It flows into the Merkys near Paūliai.
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