Two experiments demonstrated that power leads to dehumanizing others, adding to our understanding of how power affects interpersonal perception. Undergraduate participants in dyads were assigned to unequal power roles before interacting cooperatively in a mock hiring-task for Experiment 1 and competitively in a game for Experiment 2. After interacting, participants rated each other on personality traits that vary in how much they are a uniquely human trait (UH; e.g. a trait that typically distinguishes humans from animals). In both experiments, high-power participants attributed fewer uniquely human traits to low-power participants than vice versa, meaning they animalistically dehumanized a fellow student from the same university. This dehumanization occurred even while high-power participants did not evaluatively derogate low-power participants. We argue that power differences can result in perceived disparities in humanity, perhaps because UH can both express and justify power.