The Tranys is a river of Kėdainiai district municipality, Kaunas County, central Lithuania. It flows for 7.6 kilometres (4.7 mi).

The river is a left tributary of the Smilga, which flows into the Neman via the Nevėžis. Its basin is mostly covered by forests, including the Krakės-Dotnuva forest and Josvainiai forest.

The Tranys passes through Špitolpievis and Patranys villages.

The name Tranys possibly comes from Lithuanian verbs tranėti, trenėti, trūnyti ('to rot, to putrefy, to decay').