Objective: To study the quality of life in adults aged 50+ with ADHD. Method: An anonymous questionnaire survey was performed on 148 adults aged 50+ with ADHD. Quality of life was assessed with EuroQol and the Satisfaction With Life Scale. Age-matched Norwegian and Danish population samples served as reference groups. Results: Mean age of participants was 55.7 years, and mean age when diagnosed with ADHD was 50.2 years, while mean Adult ADHD Self-Report Scale Screener score was 15.2. Adults with ADHD reported significantly reduced health-related quality of life and reduced satisfaction with life compared with population norms. Nonemployment and severe ADHD were associated with poor quality of life. Conclusion: Adults aged 50+ with ADHD diagnosed in late adulthood reported significantly reduced quality of life when compared with population norms. The negative impact of ADHD persists into late adulthood. (J. of Att. Dis. 2013; XX(X) 1-XX)