President's Island is a peninsula on the Mississippi River in southwest Memphis, Tennessee. The city's major river port and an industrial park are located there. The name President or President's Island appeared as early as 1801 or 1802 in a river guide called Cramer's Navigator. The name referred to the island's size, then the largest on the Mississippi River. …President's Island is a peninsula on the Mississippi River in southwest Memphis, Tennessee. The city's major river port and an industrial park are located there. The name President or President's Island appeared as early as 1801 or 1802 in a river guide called Cramer's Navigator. The name referred to the island's size, then the largest on the Mississippi River. At that time President's Island was an actual island. Some old river maps identify the northern third of the present island as Vice President's Island.