Cities are now home to 55% of the world’s population, and that number is rising. Urban populations across the world will continue to grow, including in megacities with populations over ten million. In 2016 there were 31 megacities globally, according to the United Nations’ World Cities Report, with 24 of those cities located in the Global South. That number is expected to rise to 41 by 2030, with all ten new megacities in the Global South where the processes of urbanization are intrinsically distinct from those in the Global North. The Routledge Handbook of Planning Megacities in the Global South provides rigorous comparative analyses, discussing the challenges, processes, best practices, and initiatives of urbanization in Middle America, South America, the Middle East, Africa, South Asia, East Asia, and Southeast Asia. This book is indispensable reading for students and scholars of urban planning, and its significance as a resource will only continue to grow as urbanization reshapes the global population.