The association between personality and organizational citizenship behaviors is rarely examined in student populations. The present research tested the hypothesis that conscientiousness, agreeableness, and neuroticism predict unique variance in academic citizenship attitudes. In the first study, 270 college students completed an online questionnaire assessing their personality and academic citizenship attitudes. The results confirmed the hypothesis. In Study 2, we also tested the hypothesis that academic citizenship attitudes mediate the association between personality and citizenship behavior. Participants (n = 50) completed the online questionnaire. At a later session, they were asked to engage in an extra-role helping behavior after completing the assigned task. The results showed that general conscientiousness was associated with citizenship behavior, but academic conscientiousness attitudes mediated this association.