As adoption in our society continues to increase, mental health professionals are faced with working with the coexisting intrapersonal, familial, and social issues. The formation of an adoptive identity is one of the more critical and complicated tasks facing adoptees. Existentialism is a counseling theory that is well suited to address the issues related to adoptive identity formation in adulthood. An overview of the philosophy of existentialism as well as a detailed exploration of how to use the givens of existence along with the authentic relationship is provided as a framework for helping adults explore and develop a healthy self in context.