The Arkansas Delta is one of the six natural regions of the state of Arkansas. Willard B. Gatewood Jr., author of The Arkansas Delta: Land of Paradox, says that rich cotton lands of the Arkansas Delta make that area "The Deepest of the Deep South."
The region runs along the Mississippi River from Eudora north to Blytheville and as far west as Little Rock. It is part of the Mississippi embayment, itself part of the Mississippi River Alluvial Plain. The flat plain is bisected by Crowley's Ridge, a narrow band of rolling hills rising 250 to 500 feet (76 to 152Â m) above the flat delta plains. Several towns and cities have been developed along Crowley's Ridge, including Jonesboro. The region's lower western border follows the Arkansas River just outside Little Rock down through Pine Bluff. There the border shifts to Bayou Bartholomew, stretching south to the Arkansas-Louisiana state line.