Corn Island, earlier known as Dunmore's Island, was a former (now submerged) island in the Ohio River, at head of the Falls of the Ohio, just north of Louisville, Kentucky. Estimates of the size of Corn Island vary with time as it gradually was eroded and became submerged. A 1780 survey listed its size at 43 acres (170,000 m2). At that point it extended from what is now Louisville's Fourth Street to Fourteenth. The first settlement that later became Louisville on the mainland was established on the island in 1778 by George Rogers Clark.