Individual religion — the private, experiential, and irreducibly personal dimension of religious life, as distinguished from its institutional, creedal, and collective forms — occupies a central and contested position across the depth-psychological corpus. William James inaugurated the modern discussion by partitioning the religious field into ‘institutional’ and ‘personal’ religion, directing psychological inquiry toward the felt, first-person encounter with the sacred rather than toward ecclesial structure. Jung pressed this trajectory further, arguing that the meaning and purpose of religion reside in ‘the relationship of the individual to God,’ and that institutional creeds, by externalizing and codifying that relationship, progressively displace its ‘authentic religious element.’ For Jung, individual religion is not merely one variant among many but the telos toward which religious development strains — a position his follower Edinger operationalized in ego-Self terms, identifying all religious practice as serving to keep the individual ego related to the transpersonal Self. Otto Rank extended the analysis to the artist-genius whose ‘personal religion’ replaces collective ideology as the vehicle of self-perpetuation. Pargament complicates the picture empirically, questioning whether the privileging of personal over institutional religion — manifest in the intrinsic/extrinsic polarity and in the contemporaneous spirituality-versus-religion distinction — distorts as much as it illuminates. Hillman adds a structural caveat: the self-stage of individual development cannot be mapped without remainder onto the monotheistic stage of religious history. The resulting tension between phenomenological depth and sociological breadth remains the field’s generative fault line.