The purpose of this paper is to provide a summary of research on interventions that aim to end or reduce homelessness. Our specific goals were to gain an understanding of the different populations for whom interventions have been tested and the type of interventions evaluated, as well as to create an inventory of the indicators used to assess the effectiveness of interventions. We provide an overview of the methodology used to gather research on strategies to end homelessness. In the findings, we review the types of interventions evaluated, highlight the populations studied, and summarize the indicators of effectiveness used in the evaluations. Finally, we discuss the findings of this review in relation to current and future research on homeless interventions.