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

It flows for 4.8 kilometres and has a basin area of 2.7 km².

The Baltupis goes on the edge between Sirutiškis village and the northern limit of Kėdainiai (Babėnai).

The name Baltupis means 'white river' in Lithuainian.

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