The aim of this study was to investigate health-related quality of life (QoL) in patients with hoarding disorder (HD). Fifty-four patients with a primary diagnosis of HD, and 24 age-and sexmatched healthy control (HC) participants, completed a battery of questionnaires including the Medical Outcomes Study 36-item Short-Form Health Survey (SF-36), Saving Inventory-Revised, and Depression, Anxiety, Stress Scales. Compared to HC participants, those with HD reported poorer health-related QoL across all domains of the SF-36. When controlling for comorbid affective symptoms, HD participants scored lower than did HC participants in the QoL domains of social functioning, emotional well-being, role limitations due to emotional problems, vitality, and general health. HD symptom severity predicted, beyond the effects of affective symptoms, lower QoL in social functioning, emotional well-being, role limitations due to emotional problems, vitality, and general health. Hoarding disorder (HD), a newly recognized diagnosis in the Diagnostic and Statistical Manual of Mental Disorders, 5 th Edition (DSM-5) (American Psychiatric Association, 2013), is defined as a persistent inability to discard possessions, often accompanied by excessive acquiring, resulting in severe clutter that precludes normal use of living spaces (Frost & Gross, 1993; Frost & Hartl, 1996). Though hoarding was initially conceptualized as a subtype of obsessive-compulsive disorder (OCD), and was initially studied in the context of OCD, a growing body of research points to distinctions between HD and OCD ✰ Funded by National Institute of Mental Health grant R01 MH101163. Clinicaltrials.gov identifier NCT01956344.