Social and emotional learning (SEL) has proven to be an effective conduit to improved attendance scores, grades, and graduation rates; to adaptive behaviors and gainful employment in adulthood; and to a wide variety of other measurable factors spanning the spectrum of human adaptiveness and wellness (Aspen Institute, 2018). Although SEL has been integrated into many school-based programs to support student success, afterschool or out-of-school time (OST) programs are uniquely suited to SEL development. However, while SEL can enhance academic, emotional, social, and career wellness--areas of youth and human development that are all directly and severely affected by inequity, the application of SEL to OST is rife with equity issues and concerns. The authors' exploration of the intersections of SEL and equity in afterschool environments results from a partnership between the YMCA and Equity Meets Design, an organization dedicated to delivering equitable OST programs to youth and communities. The first step in exploring models and promising practices for equity was a comprehensive research synthesis. This article presents key findings and recommendations from the authors' research into existing scholarship and best practices. First, they outline the rationale, research questions, and methodology. Then they present their findings on major themes in the literature. Next, an equity "deep dive" explores the intersections of SEL and equity in OST settings. The article concludes with recommendations to the field.