| Icamaquã River | |
| Source1 Location: | Rio Grande do Sul state |
| Mouth Location: | Uruguay River |
| Subdivision Type1: | Country |
| Subdivision Name1: | Brazil |
| Length: | 250km (160miles)[1] |
| Basin Size: | 5044km2 |
The Icamaquã River (Portuguese, Rio Icamaquã) is a river of Rio Grande do Sul state in southern Brazil. It is a tributary of the Uruguay River.