| Putnupys | |
| Mouth Coordinates: | 55.1847°N 23.8275°W |
| Subdivision Type1: | Country |
| Subdivision Type2: | Region |
| Length: | 10.9km (06.8miles) |
| Basin Size: | 16.8km2 |
| Tributaries Left: | Slajus |
The Putnupys is a river of Kėdainiai district municipality, Kaunas County, central Lithuania. It flows for and has a basin area of 16.8km2. 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. It meets the Šušvė from the right side near Kampai I village.
The Putnupys pond of is made nearby the river mouth. The river passes through Būdai, Prapuoleniai, Kampai II, Kampai I villages.
The name Putnupys possibly comes from the Lithuanian suriname Putna.