Differences in political culture have been observed at the cross-national and subnational levels, and political culture corresponds with a wide array of important social and political phenomena. However, possible psychological correlates of political culture are less clear. Building on research in personality psychology and cross-cultural psychology, this study contemplates whether aggregate personality measures compiled in the American states correspond with patterns in political culture. Using measures of personality traits provided by more than 600,000 survey respondents, parallels with state-level measures of citizen ideology, political culture, and civic culture are examined. Possible mechanisms linking personality and political culture are discussed.