Innovations in aligning investment with sustainability led to impact investing, enabling investors to achieve conventional financial returns and measurable social and environmental returns. Since its inception in 2007, it has grown manifolds, with significant efforts being made to create a global ecosystem. However, due to limited academic literature, the theme is yet to garner the scholarly interest it deserves. In this study, we analyse and visualise a knowledge map of the impact investment research field through a comprehensive bibliometric analysis by employing a research corpus of 421 studies sourced from Web of Science and Scopus. We identify the growth trajectory, geographical concentration, productive and influential authors, journals and significant articles and examine the inter‐disciplinarity of the field. The major research themes interlinked with impact investing included; social entrepreneurship, social innovation, social finance, impact investment market, innovative financial instruments, financialisation of essential services and impact reporting. To drive the field forward, future research needs to develop an impact investment ecosystem, address behavioural issues, stakeholder management and institutional context in impact investment theme, develop and diffuse innovative financial instruments, develop a framework for standardised accounting and reporting practices to measure financial and non‐financial dimensions, tackle impact washing by fund managers, address lack of financial access to the third sector and develop the legal and regulatory framework for third sector organisations.