Responsible tourism is considered an appropriate form of tourism that promotes sustainable tourism development. These issues are increasingly being studied in the tourism industry, but there is a lack of studies that take a tourist-perspective approach. Therefore, the purpose of this study is to present the theory of responsible tourism and present the survey results of tourists' perception of responsible tourism in Phu Quoc city. The research methodology includes a review of relevant literature that allows the relationship between sustainable tourism and responsible tourism to be presented and the discussion of responsible tourism principles discussed. Tourist perceptions were analyzed through a questionnaire survey conducted in 2022. The sampling method used in the survey was a random selection. The results show that responsible tourism is still a new trend in Phu Quoc city. Visitors have low awareness of this issue. Therefore, education on responsible tourism is especially important through knowledge sharing, and building awareness about responsible tourism.