Tributaries of the Merkys

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.

The Šalčia () is a river in Lithuania. It originates in a region located to the east of Šalčininkai and runs for 76 km before flowing into the Merkys near Valkininkai.

The Varėnė is a river of Alytus district municipality and Varėna district municipality, Alytus County, southern Lithuania. It flows for 48 kilometres and has a basin area of 411 km².

Abista is a river of Alytus district municipality and Varėna district municipality, Alytus County, southern Lithuania. It flows for 22 kilometres and has a basin area of 87 km².

watercourse in Lithuania