This study, prepared within the framework of the discipline of Sociology of Religion, aims to examine the role of religion in the process of identity crisis and loneliness experienced by individuals in modern society, focusing on the concept of “crowded loneliness.” In particular, superficial relationships caused by digitalization and rapid urbanization have given rise to a way of life in which individuals are disconnected from their social environment but at the same time try to exist within a visible crowd. At this point, crowded loneliness emerges not only as a psychological feeling but also as a sociological, cultural, and communicative phenomenon. The processes of individualization and secularization brought about by modern life weaken the bonds of belonging and make the sense of social cohesion fragile. In this context, the concept of “crowded loneliness” describes a state of mind in which the individual is physically immersed in their environment but deprived of meaningful relationships. Lonely crowds are not merely an individual experience but a phenomenon that offers profound insights into the transformation of social structures. Religion continues to be one of the most powerful references capable of offering individuals a renewed sense of belonging and meaning within this transformation. However, the effectiveness of this power depends on religion’s relationship with the social context aligning with the individual’s needs and realities. In this study, which revolves around fundamental issues such as identity, belonging, meaning, and loneliness, the multidimensional and dynamic nature of the modern human condition is taken into consideration. The study draws on the views of thinkers such as Anthony Giddens, Charles Taylor, and Christopher Lasch on modern identity, individuality, selfhood, and social alienation; the individual’s experience of loneliness in modern society is evaluated in the context of the meaning, belonging, and community offered by religion. A qualitative literature review was adopted as the method, and the ways in which religion builds trust and strengthens the sense of belonging on both the individual and social levels were discussed. Crowded loneliness is not only considered an individual psychological problem but also a result of social disintegration and identity confusion. The metaphysical security and community structure that religion creates in the individual play an important role in helping the modern individual cope with loneliness. In conclusion, the study reveals the integrative and identity-forming functions of religion in the face of the structure of modern society that isolates the individual.