It is approximately 586 km in length,[1] making it the longest river to be entirely located in Vietnam.

The Dong Nai River flows through the provinces of Lam Dong, Dak Nong, Binh Phuoc, Dong Nai, Binh Duong and Ho Chi Minh City with a length of over 437 km and a basin of 38,600 km2, if calculated from the source of the Đa Dâng River, it is 586 km long.

From the confluence with the Đa Nhim River below the Pongour waterfall, it measures 487 km.

The Dong Nai River flows into the East Sea in Cần Giờ District.

After meeting the Bé River, the Dong Nai River forms a natural boundary between Dong Nai on the east and Bình Dương Province on the west bank.