This chapter presents an in-depth exploration of the Indian river delta systems, emphasizing their geomorphological, ecological, socio-economic, and management aspects. It examines major deltas, including the Ganga–Brahmaputra–Meghna, Mahanadi, Godavari, Krishna, and Cauvery, highlighting their formation processes, sediment dynamics, and hydrological regimes. The chapter discusses the critical role of these deltas in sustaining biodiversity, agriculture, fisheries, and livelihoods, while analyzing challenges posed by climate change, sea-level rise, pollution, and anthropogenic interventions. Special attention is given to deltaic vulnerability, disaster risk, and adaptation strategies. The discussion integrates remote sensing, GIS-based analysis, and policy perspectives to underscore the need for sustainable delta governance. By linking scientific understanding with developmental and conservation priorities, the chapter provides valuable insights for researchers, planners, and policymakers engaged in water resource and coastal management in India.