Christian psychotherapy appears to be useful especially for Christian clients seeking therapy, and is a growing preference among this population. Thus, the need for research on the efficacy and effectiveness of Christian interventions must be recognized. This study reviews 13 effectiveness and 21 efficacy studies of Christian psychotherapeutic interventions in various areas of psychotherapy. The majority of effectiveness and efficacy studies were shown to give positive outcomes for Christian psychotherapy, and overall, Christian psychotherapy is promising as an effective alternative to secular therapy. The need for further research in most areas is discussed.