In recent years, the concept of sustainability transitions and its related research have increasingly drawn attention from economic geographers. Sustainability transitions studies aim to investigate the multi-scalar causality of mechanisms and spatial dynamics on how regional green technologies, consuming markets and industrial transformations emerge and develop over time. This research strand has become one of the emerging topics in both evolutionary economic geography and environmental economic geography. To better capture the progress of sustainability transitions studies, this paper conducts a bibliometrics-based literature review based on 2453 articles in the field during the past two decades. Besides, through an in-depth critical review on geographies of transitions, this paper identifies several key theoretical problems and shortcomings in the geographies of transitions literature. It has addressed the theoretical merits and value of economic geography for improving sustainability transitions studies. The findings of the paper are: (1) As one of the most promising research themes in innovation studies, sustainability management and environment science, sustainability transition studies have been increasingly disciplinarily pluralistic. The economic geographical research on sustainability transitions, in particular, focuses on three key research topics, including the co-evolution mechanisms between technologies and societies in regional new green industrial path development, multi-scalar driving forces and agency-structure interactive mechanisms of sustainability transitions, the role of transitions in shaping environmental economic and socio-spatial impacts, and the varieties of transition mechanisms. (2) There are in general three perspective advantages of economic geography for transitions studies that can be identified, namely, spatio-temporal sensitivity, spatial varieties of transition mechanisms, processes and impacts/outcomes, and place embeddedness of new socio-technical regimes in industrial systems and its geographies of legitimation. (3) Three orientations for economic geography to enhancing transitions studies are identified: deepening of geographical concepts (including place, scale and space), interactions and integrations with different approaches in economic geography (namely, transitions with evolutionary, institutional, and geographical political economy), and construction avenues for comprehensive analytical frameworks (integration of geographically multi-scalar perspective with multi-level perspectives, and that of regional innovation systems perspective with the approach of technological innovation systems. (4) Three promising research agendas on geographies of transitions in China are proposed, namely, localized transitions research by incorporating the role of Chinese-specific national contexts, green niche development and spatial mechanisms of its transitions, and regional new industrial path development and its related transition studies.