Oligoryzomys victus, also known as the St. Vincent colilargo or St. Vincent pygmy rice rat, is a species of rodent in the genus Oligoryzomys of the oryzomyine tribe. Only one specimen is known, which was collected on Saint Vincent in the Lesser Antilles in about 1892, and it is now presumed extinct. Little is known about the habits or the ecology of O. victus; in fact, the only direct information is a collector's note which calls it a "forest rat". Its morphology suggests that it was not arboreal or fossorial.