The Raga River is a river of South Sudan, a right tributary of the Boro River.

The Raga River rises in Western Bahr el Ghazal near the border with Haut-Mbomou in the Central African Republic. It flows in a northeast direction past the town of Raga to its confluence with the Boro.

The river is home to Onchocerca volvulus, the parasite that causes Onchocerciasis, which causes blindness and is a serious public health issue. The disease is mainly concentrated on villages who use the river for fishing, drinking, bathing and washing.