Objectives: The purpose of this study is to analyze research trends related to single mothers. Methods: This study selected 116 papers on single mothers published in the KCI (Korean Citation Index) from 2011 to 2020 and analyzed them according to year, study type, study target, research methodology and research topic. Results: First, more than seven were published each year, and an increase was repeated. Second, the types of studies were found to be more frequent in the order of other, basic, and practical studies. Third, qualitative research methods showed a high frequency of 47 pieces, mainly consisting of case studies and basic qualitative research methods. Fourth, human subjects were the most frequent among study subjects, and, in particular, 61 studies on single mothers accounted for the majority. When looking at single mothers in detail, adult single mothers, single mothers raising children, and single mothers living in facilities were the main subjects of study. Lastly, topics related to childbirth, adoption, and raising children, as well as topics related to social awareness and discourse, showed high frequency. Conclusions: This study discusses limitations in the existing literature on single mothers and presents recommendations for future research.