The increasing rate of urbanization in Nigeria has led to significant challenges in waste management, environmental sustainability, and resource efficiency. As cities expand, conventional waste management systems struggle to keep pace with rising waste generation, leading to pollution, inefficient resource utilization, and public health concerns. This study explores how the integration of smart city innovations and circular economy principles can transform waste management systems, fostering a more sustainable urban future. Through an in-depth analysis of emerging technologies, policy frameworks, and stakeholder engagement, the research identifies key strategies for leveraging IoT-enabled waste collection, AI-driven sorting, blockchain for waste tracking, and digital monitoring systems to enhance waste efficiency and promote sustainable recycling industries.