With the widespread use of the Internet, online gambling and gaming activities have entered everyday life and have increasingly converged in the online marketplace. Since both of these activities seem to meet similar consumer needs and have many characteristics in common, research can no longer consider the two topics separately. As several disciplines have influenced online gambling and gaming studies, researchers and managers have to deal with fragmented knowledge, which makes it difficult to gain a coherent overview and proper understanding of the origins and recent developments of the field. By applying a bibliometric analysis, this study addresses this issue and provides a holistic synthesis of online gambling and gaming research that has been covered by 84169 cited references in 1876 citing articles. Citation analysis identifies the journals and publications that have received the most attention in this field. Factor and social network analyses reveal that online gambling and gaming literature consists of six main research streams. The results advance our understanding of these streams, including their most representative articles, their key themes, their network connectedness, and their temporal development. Based on the findings, this study proposes directions for future research.