Vincelestes ("Vince's thief") is an extinct genus of mammal that lived in what is now South America during the Early Cretaceous.

Specimens were found in La Amarga Formation of southern Neuquén Province, Argentina.

[1] The back teeth of Vincelestes were similar to those of therians in that they were capable of cutting and grinding.

[2] In one study on Mesozoic mammal mandibles, Vincelestes plots with herbivorous and omnivorous taxa.

[4] Some studies inversely recovered the genus as an australosphenidan,[5][6] although current thought places Vincelestes as sister to marsupials and placental mammals.