This edited volume consists of a collection of contributions to the circular economy (CE) and its implementations in Southeast Asia. The focus is on waste management and recycling, regulatory, monetary, and financial policies and CE transition and its implications for sustainable development. It provides a comprehensive overview of the application of CE from various perspectives. The volume links environmental theory and practice and offers practitioners a deeper understanding of the topic and challenges in its implementation. It looks at the macro, meso, and micro context of the circular economy implementations, from the environmental, societal, and government views across countries in Southeast Asia. It presents approaches and practical examples of how to shape environmental policy to successfully implement a CE locally, regionally, and nationally. It provides analysis of deficiencies of current environmental policies and regulations and suggests integrated environmental policies for a circular economy supported by empirical evidence at the regional level. Thus, the manuscript is a timely and practical guide for sustainability researchers and policymakers in Asia in their progress to achieve circular economy and sustainable development goals in the fast-growing economies in Southeast Asia.