What are the personality differences between individuals who commit crime and those who refrain from crime? The HEXACO model of personality combines facets of honesty and humility with those of emotionality, extraversion, conscientiousness, agreeableness, and openness to experience within a unifying framework of personality. We applied the HEXACO model to examine differences in personality between offenders and nonoffenders. Criminal offenders differed from nonoffenders on five of the six dimensions of personality proposed by the HEXACO model. Compared to nonoffenders, offenders exhibited stronger tendencies toward greed and unfairness, but were also more anxious and fearful. Conversely, the offenders scored lower than nonoffenders on a number of facets of sociability, liveliness, and social boldness. The present findings indicate that offenders may in part be characterized by increased negative emotions but decreased sociability and liveliness. The HEXACO model of personality provides a valuable tool for studying this unique and important population.