Objectives: The purpose of this scoping review is to suggest future treatment and research directions for adult ADHD by examining domestic trends in Korean research on adults with ADHD tendencies. Methods: The present review used Arksey and O’Malley’s scoping review methodology. Eight domestic databases were used, and a search was conducted in July 2023 while targeting domestic papers that had been published within the last 20 years. Subject keywords included ‘College student’, ‘Soldier’, and ‘Adult’, and the subject-related terms that were searched for included ‘ADHD’. Results: From 502 initially collected articles, 78 were ultimately selected for analysis in this work. Domestic research related to adult ADHD has been steadily conducted since 2000, and most such research has been done in psychology. Regarding the research participants, those in their 20s were the most common age group, and college students accounted for more than half of participants. In terms of study design, survey studies were the most common, while there was a lack of studies on intervention. The subject most closely dealt with in ADHD studies was interpersonal relationships, followed by depression and addiction. The main intervention used in this study was cognitive behavioral therapy, however it was limited in number. Conclusions: More multifaceted studies on adult ADHD need to be conducted using various research methodologies, and there is also a need for more studies using interventions. It is also important for such research to be expanded to broader geographic areas, ages, and occupations.