Political discussion matters for a wide array of political phenomena such as attitude formation, electoral choice, other forms of participation, levels of political expertise, and tolerance. Thus far, research on the underpinnings of political discussion has focused on political, social, and contextual forces. We expand upon this existing research by examining how individual personality traits influence patterns of political discussion. Drawing on data from two surveys we investigate how personality traits influence the context in which citizens discuss politics, the nature of the relationship between individuals and their discussion partners, and the influence discussion partners have on respondents' views. We find a number of personality effects and our results highlight the importance of accounting for individual predispositions in the study of political discussion.Keywords Personality Á Big Five Á Political discussion Á Social influence Most forms of political participation require a conscious decision to break from the routine of our everyday life to engage with the political world. We choose to stop off at our polling place after work to cast a vote. We go outside to pound a candidate's sign into our yard. Or, we miss spending a Saturday afternoon at home to attend a political rally. Most participation then can be seen as a series of deliberate choices about how much time to devote to political matters, operating within a clearly defined context. Consequently, most studies of political