While organizational citizenship behaviors (i.e., employee’s choosing to perform above and beyond work expectations) are beneficial for the success of any organization, there has been little research on this form of prosocial behavior in private correctional agencies. This study is the first to examine the relationship between two forms of organizational commitment (affective and continuance) and organizational citizenship behaviors for 160 correctional staff at a maximum security private US prison. Results of the Ordinary Least Squares regression analysis supported the predictions that affective commitment would have a positive association with organizational citizenship behaviors and continuance commitment would have a negative association. Possible interventions that private correctional organizations can undertake to encourage affective organizational commitment from their staff are discussed.