The purpose of this study was to review the research trends and to conduct meta-analysis on the effects of the group counseling programs by analyzing 162 studies on victims of sexual assault. The research trends analysis focused on the number of studies by year, subjects, contents, and method of the study. For the meta-analysis, 12 articles were selected. The results revealed that the number of articles has dramatically increased since 2006. Second, as for research methods, quantitative studies are 54(33.3%), followed by the studies for qualitative studies, literature review, mixed research in order. Third, as for the participants, 45 studies(27.8%) are for adults, followed by the studies for children, adolescents in order. Fourth, concerning study themes or variables, 70(43.2%) are for emotion, followed by trauma-related, physical response-related, in order. Fifth, from 12 group counseling programs on victims of sexual assault 101 effect sizes were calculated with an average effect size of 1.073.