Contemporary organizations must be adaptive and agile as the environment changes. To respond to change, leaders must find ways of integrating learning into everyday work experiences. This invites the question: how do leaders facilitate individual, group and organizational learning? Several studies have examined relationships among leadership and learning and potential mediating and moderating variables. However, because this literature is extensive and fragmented it is difficult to discern what is known about how leadership contributes to individual, group and organizational learning. Accordingly, there is a pressing need to assemble and evaluate the existing studies. To address this limitation of the literature, this paper presents a systematic review and critique of literature in this field. Our review of 105 studies suggests that there are statistically significant relationships between different types of leadership and learning at the individual, group, and organizational levels. Furthermore, the findings indicate that these relationships are often mediated by other variables. However, little is known about moderators and boundary conditions. Based on the findings, it would be premature to say with certainty that leadership causally influences learning, since the empirical basis for such a claim is lacking. We outline the conceptual, theoretical, methodological, and empirical refinements needed to guide future research on learning-oriented leadership and advance this research trajectory. The findings of our review and our conclusions will be informative for researchers and practitioners.