A growing body of evidence points to the important role of spirituality in treating medical and psychological conditions. The authors suggest that spirituality is a 5th force in counseling and psychology. Consequently, the assessment of spirituality is a new and growing area of interest for counselors. Assessment can assist both the counselor and client in obtaining a better understanding of the role of spirituality in the issues that bring the client to counseling and in designing treatment interventions appropriate for resolution of those issues. Selected instruments currently in use are described and their psychometric properties and potential uses are examined.