Adverse childhood experiences (ACEs) have been associated with a variety of negative physical and psychological health outcomes. The mechanisms by which this occurs and potential protective factors present in this relationship are understudied. Mindfulness is a cognitive resource that may protect individuals against symptoms of psychological distress. It has five core facets and encourages a nonjudgmental acceptance of the present moment. The purpose of this study was to explore the role of mindfulness in the relationship between ACEs and depression, both as a mediator and as a moderator, or protective factor. We hypothesized that the aware, describe, and non-judgement facets of mindfulness would be key factors in both sets of analyses. Participants at a university ( = 279) were given the Five Factor Mindfulness Questionnaire (FFMQ), the Adverse Childhood Experiences Scale (ACES), and the Patient Health Questionnaire (PHQ-8) to measure depression. Results indicated that the describe CI [.02, .11], aware CI [.05, .17], and non-judgement CI [.06, .18] facets of mindfulness significantly mediated the relationship between ACEs and depression. Additionally, the aware facet of mindfulness was also a significant moderator in this relationship, [ (interaction) = -3.22,  < 0.01], such that individuals with a high level of awareness had no increase in depression even as the number of ACEs increased. Negative cognitions associated with ACEs may harm one's ability to effectively describe their feelings and to be fully aware of the present moment, which may contribute to symptoms of depression. Implications for mindfulness-based interventions (MBIs) are discussed.