Evidence has accumulated over the past three decades supporting mindfulness‐based approaches as efficacious methods for enhancing adults' psychological health and wellbeing. More recently, mindfulness‐based approaches have been used with children and adolescents in school, community, and clinical settings. Although empirical research and applications of mindfulness with youth are still in early development, these approaches are considered acceptable, feasible, and potentially effective in enhancing the psychological health and wellbeing of younger populations. The chapter focuses on the construct and practice of mindfulness as it is used in the prominent secular approaches, mindfulness‐based stress reduction (
MBSR
) and mindfulness‐based cognitive therapy (
MBCT
), where the regular practice of mindfulness meditation is fundamental to the approach. The relationship of mindfulness to personal and interpersonal domains of wellbeing is investigated through examination of related theoretical and empirical research incorporating cognition, affect, physiology, neurobiology, and their interrelationship with the mechanisms of mindfulness, and extended with developmentally specific relevance to children and adolescents. The empirical methods for assessing the associations between mindfulness and wellbeing are considered, with suggestions for further developments in this area. The current applications of mindfulness‐based approaches with youth are considered, particularly those offering potential for enhancing wellbeing outcomes across a broad spectrum of the population, rather than restricted clinical populations. Finally, it is proposed that the advancement of this field requires significant investment of effort in establishing an empirical evidence base, and the development of outcome measures that are relevant and specific to enhancing wellbeing, rather than merely symptom reduction.