People from different cultures may perceive the same behavior in contrasting ways, thereby reaching very different conclusions. We argue that cultural norms not only guide our own behaviors but also color the way we perceive others. Here, we overview research on the different cultural norms people may use when judging others. Specifically, we discuss work on norms pertaining to how people describe, evaluate, and support others. Additionally, we also highlight some important implications of the reviewed research and underscore some key environmental factors that motivate stronger adherence to cultural norms. We conclude that the study of interpersonal perception is incomplete without taking into account the influence cultural norms have on the way we perceive others.