Much progress has been made toward determining "what works" to support the well-being of trauma-exposed young children through mental health interventions. However, compared to the number of young children who have access to mental health services, many more young children have access to preschool. Estimates suggest that one in four (Briggs-Gowan, Ford, Fraleigh, McCarthy, & Carter, 2010) to one in two preschool children have experienced a potentially traumatic event (Jimenez, Wade, Lin, Morrow, & Reichman, 2016) and may be in need of trauma-informed supports. However, only 2.5% of preschool-aged children received mental health services in the last year (Child and Adolescent Health Measurement Initiative, 2016), indicating a large gap between exposure to trauma and receipt of services for young children. Comparatively, approximately 48% of children aged 3 and 4 years, almost four million children, are enrolled in preschool annually (U.S. Census Bureau, 2016). In some states, upward of 80% of children will have spent at least some time in a preschool setting by the time they reach kindergarten (Updegrove, Long, & Ruth, 2017). Preschools are potential natural systems of care that can be leveraged to support children who have experienced trauma. However, there is little research to suggest best practices for trauma-informed preschools, this despite the fact that young children are exposed to trauma at disproportionate rates compared with older children (Fantuzzo & Fusco, 2007; Lieberman, Chu, Van Horn, & Harris, 2011), the negative effects of which are well-established. This conceptual article details the need for and highlights recommendations to guide the development of trauma-informed preschool models for young children. This article does so by discussing the known prevalence and impact of early trauma, exploring evidence related to early childhood trauma interventions and trauma-informed education for older children, and outlining recommendations for key components of trauma-informed preschool models. Recommendations for policies to support trauma-informed preschool models and for future research are also discussed. Early Adversity Young children experience particularly high rates of adversity and trauma. By age 4, 25% to 50% of preschool-aged 789254T ECXXX10.