Irizar Island (65°13′S64°12′W) is an island 0.8 km (0.5 mi) long, lying 0.80 km (0.5 mi) northeast of Uruguay Island in the northeastern part of the Argentine Islands, in the Wilhelm Archipelago, Antarctica. It was discovered by the French Antarctic Expedition, 1903–05, under Jean-Baptiste Charcot, and named by him for Captain Julián Irízar of the Argentine Navy.