| Capitão Cardoso River | |
| Pushpin Map: | Brazil |
| River System: | Roosevelt River |
| Source1 Location: | Rondônia state |
| Mouth Coordinates: | -10.9892°N -60.459°W |
| Basin Size: | 3,815,6272 km2 |
| Subdivision Type1: | Country |
| Subdivision Name1: | Brazil |
The Capitão Cardoso River is a river forming part of the border between Rondônia and Mato Grosso states in western Brazil. It is a tributary of the Roosevelt River.
The river's watershed is a sub-basin of the Roosevelt River and its headwaters are located in an indigenous reserve near Chapada dos Parecis.[1]