The largest rivers in Arkansas are the Mississippi River, the Arkansas, the White, Red and Ouachita Rivers. Rivers and other flowing bodies of water are measured by mean annual flow of water in cubic feet per second (CFS).
The Mississippi River is the largest in Arkansas, with its mean annual flow being 671,500 CFS. It extends from Canada, with its most northern point in the United States in Minnesota, to the Gulf of Mexico in Louisiana.
The Arkansas River is the second largest in the state of the same name with a mean annual flow of 47,970 CFS. It extends from Colorado from the east to the Arkansas border, where it converges with the Mississippi River.