As cities continue to expand and evolve, it becomes imperative to examine the intricate relationship of urbanization and suicidal behaviour. The chapter delves into what urbanization entails, global urbanization trends, followed by a thorough exploration of theoretical perspectives. From Durkheim's seminal work to more recent frameworks like the Three Step Theory and concept of Urban Stress, we trace the evolution of thought connecting urban life to suicidal tendencies. Central to this discussion is an exhaustive examination of key urban factors influencing suicidal behaviours. These include social fragmentation, economic disparities, population density, and environmental stressors unique to urban living. A range of interventions, from community-based initiatives fostering social cohesion to environmental modifications and economic measures, are described. Alongside these, role of mental health services, leveraging technology and urban planning to create more supportive city environments, has been described rigorously. The chapter concludes by identifying critical gaps in the current research landscape, advocating for future studies that explore the nuanced dynamics of urbanization and suicidality. This comprehensive examination aims to inform policymakers, mental health professionals, and researchers about the complexities of urbanization and its implications for suicidal behaviour.