Organizations have become aware of the need to expand their objectives beyond traditional economic issues. Thus, since the concepts of Corporate Social Responsibility (CSR) and Corporate Sustainability (CS) were introduced, more and more managers introduce social and environmental objectives in their decision-making process. Additionally, organizations focus their efforts on the development of their intangible assets to achieve better performance, since these guarantee their survival, value creation and improvement of competitive advantage. The set of intangible assets that an organization possesses constitutes its Intellectual Capital (IC). The existing literature has repeatedly illustrated different concepts and dimensions of IC from various perspectives. However, the terms “green”, “social” and “sustainable” IC have recently been incorporated into the academic literature on the management of companies’ social and environmental responsibility, representing the fusion between two key aspects for the future success of organizations: (1) the management of intangibles and (2) sustainability. In order to increase the knowledge in the field of intangibles management from the perspective of sustainability, the purpose of this work is to carry out a systematic review of the scientific literature around a very new topic: Sustainable Intellectual Capital (SIC). The research questions that arise are: (1) How has the scientific production on the SIC evolved? and (2) What are the fundamental characteristics of this type of study? To answer the research questions formulated, a systematic review of the literature was carried out according to the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses methodology (PRISMA, 2022). Data collection was carried out between January and July 2021 through the Web of Science and Scopus databases. After eliminating duplicate papers and those that did not coincide with the topics of interest, the final sample consisted of 32 articles. The results obtained shed light on the following aspects: (1) 71.87% of the papers on the SIC have been carried out in the years 2019, 2020 and 2021; (2) The scientific production analysed has been divided into eight blocks: the relationship between the green management of human resources and Green Intellectual Capital (GIC), the relationship between the GIC and green innovation, the conceptualization and analysis of the SIC construct, the link between logistics and management of the green supply chain with the GIC, the effect of organizational environmental awareness and environmental regulations on the GIC, the effect of the GIC on the competitive advantage of the organizations, the impact of the GIC on the CS and the role of information and communication technologies and the GIC in the achievement of the CS; (3) The use of quantitative methodologies predominates over qualitative ones. In particular, the use of Structural Equation Modelling (SEM) stands out; (4) Most of the studies have focused on the analysis of companies in the secondary sector, more specifically, manufacturing firms.