In recent years, "dark tourism", defined as the act of travel to destinations historically associated with death and tragedy, has attracted extensive attention from scholars. A large number of relevant research literatures have emerged, highlighting a constantly evolving field of knowledge. Using the Web of Science Core Collection as the data source and the CiteSpace tool, this study mapped the current knowledge domain of international dark tourism research. The following results are derived: (1) The number of international dark tourism research articles shows a steadily increasing trend, with a large body of literature appearing after 2008; (2) The majority of papers were published in prestigious journals of tourism, such as Annals of Tourism Research and Tourism Management; (3) Most authors originate from Europe, America and East Asia, but these researchers seldom collaborate with each other; (4) Seventeen publications can be identified as the most influential in the development of the knowledge base and network evolution in this domain; (5) The studies focus primarily on the supply-side of dark tourism, while studies on demand-side are lacking. Through the analysis of both the development of international dark tourism and the present circumstances, this paper proposes that future developments in domestic dark tourism should center on the construction of the theoretical system, the innovation in research methods, as well as the communication and cooperation of researchers. The results of this review on international dark tourism research provide strategies to guide Chinese research and practice.