With increasing population density and urban expansion, next-generation waste management has emerged as a critical area for sustainable development. Beyond conventional disposal, the focus has shifted toward resource recovery, digital monitoring, and integrated material lifecycle management. Researchers are leveraging artificial intelligence, smart sensors, and blockchain to optimize waste segregation, traceability, and recycling efficiency. Organic waste valorization, plastic upcycling, and zero-waste systems are gaining traction across municipalities and industrial zones. Social dimensions—such as community engagement and behavioral economics—also play a vital role in adoption. As landfills reach capacity and environmental standards tighten, Next-Generation Waste Management emphasizes proactive design and cross-sector collaboration to transition toward a low-impact, circular future. Long-term success depends on harmonizing regulatory frameworks, infrastructure investments, and behavioral change at scale. This evolving domain increasingly influences sustainable urban development, environmental equity, and global climate targets.