The present study measured the anterior cingulate cortex (ACC) and caudate nucleus (CN) volumes of patients diagnosed with obsessive-compulsive personality disorder (OCPD) and compared them with healthy controls with an aim to investigate its neuroanatomy of. The Sociodemographic and Clinical Data Form, Beck Anxiety Scale (BAS), Beck Depression Scale (BDS), and Frost Multidimensional Perfectionism Scale (FMPS) were administered to 18 healthy controls and 16 patients diagnosed with OCPD. Volumetric measurements of the right/left ACC and CNs were performed for all the participants through brain magnetic resonance imaging. There was no significant difference between patients and controls by ACC and CN volumes. BAS, BDS, and FMPS scale scores in the patient group were statistically higher compared to the control group. Volumetric changes in the ACC and CN do not play a role in the pathophysiology of OCPD. Functional imaging techniques may be useful in explaining the likely role of these regions in the etiopathogenesis of the disease.