Isognathus scyron is a moth of the Sphingidae family. It is known from Surinam, French Guiana, Cuba, Costa Rica and Guatemala.The wingspan is 72–73 mm. There are distinct bands on the upperside of the abdomen and the underside of the abdomen is dirty white or slightly buff, faintly speckled with russet scales. The upperside of the thorax and forewings is russet-drab-brown.