This study aims to determine the effectiveness of online group guidance services in reducing social media dependence of high school students. This research is an experimental research with one group pretest-posttest design. The population in this study were XII grade high school students, with a sample of 15 people taken with purposive random sampling technique. In analyzing the data, researchers used the Wilcoxon Test technique. The results obtained from the Wilcoxon Test Z value of -3.287 with a sig of 0.001 is smaller than sig 0.05 (0.001 < 0.05) which means H0 is rejected and Ha is accepted, so the pre-test and post-test results are different. The findings in this study are that online group guidance services are effective for reducing social media dependence in XII grade high school students. For further research, it is recommended to conduct follow-up using individual or group counseling.