This study aims to review and analyze research articles on English language learner autonomy in academic journals on English language teaching published in South Korea in recent 20 years. A total of 90 articles were analyzed according to research periods, participants, methods, and themes. The results showed that the number of learner autonomy research has increased since 1998. The favored research participants were college students followed by elementary, middle school and high school students. Recently more studies were conducted with mixed level students, teachers, and experts. Mixed and quantitative methods were evenly dominant research methods, but mixed methods have been more popular in recent years. In terms of research themes, teaching and learning methods appeared most often, while there emerged a variety of themes such as correlations among variables related to self-directed learning ability, textbook analysis and development of instructional models as well as the concept of learner autonomy, learners’, parents’, and teachers’ perceptions of learner autonomy. Based on the findings, important pedagogical implications and future directions for research regarding English learner autonomy were suggested.