Objective: This study aimed to investigate the relationship between Cognitive Disengagement Syndrome (CDS) symptoms in children/adolescents and their parents within the Turkish population, examining the association with co-occurring ADHD symptoms, peer/social relationships, and total difficulties. Method: The study included 229 parents aged 18 to 50 with children aged 6 to 18 from the staff of Karabuk Training and Research Hospital. Data collection occurred from April to September 2022. Participants completed various scales, including the Adult Concentration Inventory (ACI), Adult ADHD Self-Report Scale (ASRS), Depression Anxiety Stress Scale-21 (DASS-21), Conners' Parent Rating Scale-Revised Short Form (CPRS-R), Strengths and Difficulties Questionnaire (SDQ), and Child and Adolescent Behavior Inventory Sluggish Cognitive Tempo Scale (CABI-SCT). Results: A positive correlation was found between CDS symptoms in children/adolescents and their parents. CDS symptoms in children were also associated with significant comorbidities, such as ADHD, oppositional defiance, peer problems, and internalization problems. In parents, CDS was observed to be associated with levels of depression, anxiety, and stress. Conclusion: The study highlights the strong relationship between CDS symptoms in children and their parents, suggesting potential genetic and environmental factors. CDS is associated with significant mental health comorbidities across all age groups. The findings underscore the need for interventions to support the mental health of both children and parents with CDS. Further research is needed to elucidate the impact and etiology of CDS on family dynamics and mental health.