This study investigates the integration of Corporate Social Responsibility (CSR) within Microfinance Institutions (MFIs) in relation to Sustainable Development Goals. Through a Systematic Literature Review (SLR) and bibliometric analysis of 281 Scopus-indexed articles from January 1999 to November 2023, we delineate seven essential thematic clusters that define the CSR paradigm in MFIs: performance dimensions, balanced social and financial goals, improved social performance, qualitative perspectives, mission drift determinants, environmental sustainability, and funding sources and lending techniques. The study uncovers emerging research areas including the impact of digital-fintech innovations, climate change adaptations, the rise of Islamic microfinance, and explores significant gaps such as internationalization, corporate governance, gender diversity, and alternative funding mechanisms. These insights are pivotal for framing future research and offer critical guidance for policymakers and practitioners aiming to maximize the societal impacts of MFIs. Our analysis not only maps the current landscape but also sets a comprehensive agenda for enhancing CSR’s role in achieving sustainable development, thus providing a strategic framework for ongoing empirical and theoretical advancements.