Lestodon is an extinct genus of megafaunal ground sloth from South America during the Pleistocene period. Its fossil remains have been found in Argentina, Paraguay, Uruguay, and Bolivia. 4.6 m (15 ft) from snout to tail tip, it is estimated to have weighed between 2 and 4 tons. It was a herbivore and primarily fed on the grasses on the South American plains and is thought to perhaps have used its semi-bipedal stance to obtain foliage from trees. Lestodon is placed as member of the Mylodontidae as indicated by the lobed form of the last tooth in the dentition.
The genus name "Lestodon" derives from the Greek for "robber tooth."