The purpose of this article is to provide a brief review of group treatment for posttraumatic stress disorder (PTSD). This review includes a description of group-based treatments for PTSD and the available data on the efficacy of group treatment for PTSD. The literature review indicates that group treatment for PTSD is efficacious compared with no treatment. However, specific types of group treatment are not efficacious when compared with a nonspecific group treatment, such as psychoeducation or supportive counseling. Recommendations for practice and research are made in light of the available literature.