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Introduction: Dark personality traits include a range of socially aversive personality traits that are associated with risky behaviors and other mental health risk factors. However, it is not clear which specific risky behaviors are associated with each Personality trait (Machiavellianism, Narcissism, Psychopathy and Sadism) outlined in this conceptual framework. Aim: Examining the Relationship Between Dark Tetrad of Personality and Domain-Specific Risk-taking Behavior Among Iranian Young People was the aim of this study. Method: The Research Design for this study is based on Descriptive Correlational Research method, A sample of 848 Young people was selected with the convenience sampling method from the Tehran using an online research platform. Domain-Specific Risk-Taking (DOSPERT) Scale and the Short Dark Tetrad (SD4) were used for data collection. The data were Analyzed by the Pearson correlation coefficient (PCC) and Stepwise regression using SPSS version 26. Results: The correlation matrix of the research variables demonstrated that all components of the Dark Tetrad of Personality (Machiavellianism, Narcissism, Psychopathy, and Sadism) are positively correlated with various domains of risk-taking (Social, Recreational, Gambling, Health/Safety, and Ethical). Among the four personality traits, Psychopathy and Sadism show the highest correlation, while Narcissism and Machiavellianism demonstrate a weaker correlation with risk-taking behaviors. Additionally, only Machiavellianism and Narcissism were linked to risky investments. Conclusion: In conclusion, for more accurate clinical decision-making concerning the relationship between Dark Personality traits and risky behaviors, it is essential to consider the specific and unique relationship between the traits and domains