Future-oriented cognition has been shown to be an important driver of several functional behaviors. In the present article, we build and test theory empirically on the influence of dispositional future focus on organizational citizenship behavior (OCB). We integrate future focus research with regulatory focus theory to examine the two regulatory foci (i.e. promotion and prevention focus) as mediating mechanisms through which future focus influences five distinct organizational citizenship behaviors (i.e. altruism, civic virtue, conscientiousness, courtesy, and sportsmanship). In line with our hypotheses, results from a study of 845 employees show that future focus has a positive influence on altruism, civic virtue, and courtesy over and above important predictors of OCB identified in previous research. Mediation analyses support our theoretical model, indicating that different OCBs are influenced by future focus through either promotion or prevention focus at work.