The Putnupys is a river of Kėdainiai district municipality, Kaunas County, central Lithuania.

It originates in the Pernarava-Šaravai Forest, 3 km from Skaistgiriai village.

The Putnupys flows to the south east, at first through the forest, later through the agriculture fields.

The Putnupys pond of 4.8 hectares (12 acres) is made nearby the river mouth.

This article related to a river in Lithuania is a stub.