The Saline River, also known as Saline Creek, is a 202-mile-long (325 km) tributary of the Ouachita River in the south central portion of the U.S. state of Arkansas. It is the longest river that flows entirely within the state of Arkansas.

The Ouachita River is a 605-mile-long (974 km) river that runs south and east through the U.S. states of Arkansas and Louisiana, joining the Tensas River to form the Black River near Jonesville, Louisiana. It is the 25th-longest river in the United States.