| Baltupis | |
| Subdivision Type1: | Country |
| Subdivision Type2: | Location |
| Length Km: | 4.8 |
| Mouth Coordinates: | 55.3486°N 23.9958°W |
| Basin Size Km2: | 2.7 |
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. It is a tributary of the Nevėžis River. The Baltupis goes on the edge between Sirutiškis village and the northern limit of Kėdainiai (Babėnai).
The name Baltupis means 'white river' in Lithuainian.