Evaluation policy has been identified as an important means of shaping and influencing organizational evaluation practice, yet, to date, little empirical research has been conducted to deepen our understanding of this relationship. The purpose of this study was to illuminate evaluation policy's role in leveraging organizational capacity to do and use evaluation. We interviewed 18 published evaluation scholars and practitioners from North America and Europe about this topic. A thematic analysis of findings underscores the importance of context, policy attributes, enablers, and organizational benefits. Based on the findings, we developed an ecological conceptual framework to guide thinking about the role of evaluation policy in capacity building. We discuss these findings in terms of practical implications of understanding context, redressing the imbalance between learning and accountability purposes of evaluation, and organizational leadership, and we conclude with some implications for research.