Childhood trauma and dissociative experiences are suggested to be predisposing transdiagnostic factors for attention deficit /hyperactivity disorder (ADHD) as well as many psychiatric disorders. Trauma-related symptoms such as motor restlessness, emotional instability, and concentration problems can mimic, trigger, or exacerbate ADHD symptoms. Moreover, given the relationship between ADHD and trauma-induced distress, it has been suggested that dissociative experiences and attention problems may reveal overlapping characteristics. The aim of this study was to investigate the associations between dissociative experiences and attention deficits by carrying out mixture analysis. A thousand and thirty-seven participants volunteered to the online investigation. Participants completed a test battery that included a sociodemographic form as well as the Adult ADHD Severity Rating Scale (ASRS), Wender Utah Rating Scale (WURS), Childhood Trauma Questionnaire (CTQ), Dissociative Experiences Scale (DES), and Somatoform Dissociation Questionnaire (SDQ). Item responses on the DES and attention deficit symptoms as indexed by the ASRS were subjected to latent class analysis. The three-latent-class model outperformed alternative mixture models. Mixture analysis classified the sample into three homogenous subgroups as follows: (1) No/low dissociation or attention problems; (2) Moderate dissociation with attention problems; and (3) High dissociation with attention problems. High dissociators with attention problems were characterized by heightened scores on somatoform dissociation and emotional neglect. No/low dissociation or attention problems latent class reported significantly lower scores on hyperactivity/impulsivity, depression, attention deficit in childhood, and sexual abuse than both moderate and high dissociation latent classes. High dissociators and moderate dissociators significantly differed on conduct problems and physical abuse. We concluded that impulsive hyperactivity, depression, and childhood sexual abuse were common features in heightened dissociation latent classes, as well as attention deficit.