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This study aims to present a comprehensive knowledge mapping of plastic pollution on coastal/marine tourism research. To achieve this objective, the present study employed a two-tier analysis, including a systematic review of literature and bibliometric analysis of 164 scholarly articles spanning 1999 to 2022. The results underline the multidisciplinary nature of this research domain, characterized by a significant upswing in publications. The dominant countries in this field are identified as Brazil, Australia, and the USA. A noteworthy collaboration dynamic between the Chinese Academy of Sciences, East China Normal University, and the University of Chinese Academy of Sciences has emerged, signaling opportunities for enhanced cross-border cooperation. Jambeck, who provided data support for this research field, is found as the most cited author. Marine Pollution Bulletin, Environmental Pollution, and Science of the Total Environment are the most prolific journals discussing such topics. The primary research clusters in this field include seasonal comparison, Qinghai Lake, and small plastic debris. Additionally, scholars have recently focused on new topics such as seasonal comparison, case study, spatial pattern, and the Southern Baltic Sea in the last 3 years. This research also reports 10 articles with the highest citations and 10 highly cited papers. Not only this, the present study presents the inaugural bibliometric analysis on plastic pollution in coastal and marine tourism. To the authors' knowledge, it stands as a pioneering investigation of its nature, offering a comprehensive view on the research domain by evaluating a time span exceeding two decades, with a specific emphasis on the literature pertaining to marine tourism. [ABSTRACT FROM AUTHOR]