Turgis is the largest known crater on Saturn's moon Iapetus. It is 580 km in diameter, 40% of the moon's diameter and one of the larger craters in the Solar System. It is named after a Saracen baron, Turgis of Turtelose (Tortosa).
It is located in Cassini Regio at 16.9ðN, 28.4ðW. The rim has a scarp about 15 km high that generated a landslide. It is overlain by Malun, the 13th-largest crater on Iapetus.