Smart Cities aim to enhance urban living through technology-driven infrastructure, efficient public services, and citizen engagement. Evaluating the effectiveness of Smart Cities requires understanding citizen perceptions regarding service delivery, infrastructure, governance, and quality of life. This study investigates citizen perceptions of Smart City initiatives in selected cities of Tamil Nadu, including Chennai, Coimbatore, and Madurai. Primary data were collected through structured questionnaires from residents, covering areas such as urban mobility, digital services, sanitation, and public safety. The findings reveal that while citizens acknowledge improvements in digital governance and infrastructure, challenges persist in service accessibility, environmental management, and civic participation. The study offers practical insights for policymakers to enhance Smart City efficacy by aligning technological interventions with citizen expectations.