Jainism is the sixth-largest religion in India and is referred to as the religion of non-violence. The present chapter focuses on understanding the application of Jain practices and principles in the context of positive psychology, mental health, and other psychological outcomes. First, we begin by briefly discussing Jain philosophy, its historical roots, divisional sects, and the demographic distribution of the community. Then we highlight some fundamental teachings and principles of Jainism and their contribution to spirituality, well-being, virtues, and perspective-taking. We then proceed to describe primary practices and principles of Jainism that contribute to positive psychology, emphasizing specifically on virtues and character strengths; and on well-being, peace education, pro-environmental attitudes, positive interpersonal relationships, positive mental health, and empirical evidence for Jain prekshā meditation. The chapter concludes by discussing the implications and significance of Jain practices and principles and the need for more empirical research.