India has become the largest populated country in the world in 2023 which has resulted in an increasing attention on India's population and its changing age structure, demo-graphic transitions, and their long-term implications. India Population Report is developed based on landmark surveys and research on population, health, ageing, fertility, nutrition, migration and women and children undertaken by the International Institute for Population Sciences (IIPS), India. This volume studies various aspects of population and health issues in India providing a holistic narrative of the current scenario and future implications. By utilizing latest data and scientific evidence, chapters in this volume explain the achievements so far and examine the challenges ahead in respective fields, while identifying thrust areas for further research and action. Contributions to the volume come from leading and renowned research and data experts in the field, bringing together a cohesive, multifaceted work of immediate relevance.