Introduction: Childhood trauma (CT) is recognized as a critical factor influencing psychological development and behavioral outcomes in adulthood. Experiences such as emotional abuse, physical abuse, and neglect can shape personality traits and increase tendencies toward aggression. The Dark Triad (DT) personality traits -comprising Narcissism, Machiavellianism, and Psychopathy- are associated with manipulative, self-centered, and antisocial behaviors. Purpose: This study aims to investigate the relationship between childhood trauma (CT), Dark Triad (DT) personality traits, and aggression in a diverse adult sample. Method: The study included 379 participants (83.6% women, 16.4% men) aged 18 and older. Data were collected using the Demographic Information Form, Childhood Trauma Questionnaire, Short Dark Triad Test, and Buss-Perry Aggression Questionnaire. Statistical analyses were conducted with SPSS v. 27.0. Results: Significant positive correlations were found between CT and both DT traits and aggression. Emotional abuse (r = .26, p < .01) and emotional neglect (r = .19, p < .01) were strongly linked to increased anger. Among DT traits, Psychopathy showed the strongest association with anger (r = .54, p < .01), followed by Narcissism (r = .28, p < .01) and Machiavellianism (r = .14, p < .01). Individuals at high risk for CT exhibited significantly higher DT traits and aggression. Those at risk for physical abuse scored higher on psychopathy, anger, hostility, and overall aggression. Emotional abuse was linked to elevated psychopathy, verbal aggression, anger, and hostility. Physical neglect correlated with psychopathy and physical aggression, while emotional neglect was associated with increased anger, hostility, and total aggression, but not directly with DT traits. Conclusion: The findings demonstrate that childhood trauma has a significant impact on the development of personality traits and aggressive behaviors in adulthood. These results enhance theoretical understanding and emphasize the importance of targeted psychosocial interventions to reduce the long-term effects of childhood trauma.