Identity and identity management are an emerging area in academic research and consolidation of the discussion on what compose their issues is just beginning. Identity Management Systems (IdMS) is another key element of research involving the identity and identity management domains. As digital identity becomes more and more important in the online world, the emergence of IdMS has brought about primary changes to different online contexts. The purpose of this paper is to provide an assessment of the state of IdMS research and analyse the extant studies. Accordingly, we comprehensively review the research on IdMS that has been conducted in different fields. We also reveal the emergence of IdMS research domain and its current status by using a detailed analysis and taxonomy of 106 publications from key research outlets. This paper develops a framework for classifying the studies, reviews key findings, and identifies opportunities for future research into IdMS.