The Panamint kangaroo rat, Dipodomys panamintinus, is a species of rodent in the family Heteromyidae. It is endemic to the Mojave Desert in California and Nevada, in the United States. Their tails are 7 inches long. They are good swimmers. The Panamint kangaroo rat is named after an area of its range in the Panamint Valley and Panamint Range Mountains just west of Death Valley.