To systematically examine international trends in peer supervision research in the field of counseling, this study analyzed 59 articles published in English in international journals between 1969 and December 2023. The results are summarized as follows. First, the topics of peer supervision research were identified in the following order: outcome studies, topic overviews, case studies, etc. Second, the research methods were qualitative, literature review, quantitative, and mixed methods. Third, in terms of research subjects, practicing counselors and school counselors accounted for 57.63% of all studies. Fourth, peer supervision was most often conducted once a week for 60 to 90 minutes over a period of 15 weeks or less. Finally, peer supervision outcome measures were categorized and presented. Based on the results of these analyses, directions and implications for future peer supervision research in Korea were suggested.