There are concurrently with different results of studies about cognitive functions of Obsessive-Compulsive Disorder (OCD), impairment in non-verbal memory and executive functioning in OCD, has shown consistent results in several studies. In this study, 62 OCD patients and 40 healthy controls were participated. Firstly, cognitive functions of OCD group and healthy control group were compared in terms of scores in Stroop Test, Wisconsin Cart Sorting Test (WCST), Auditory Consonant Trigram Test (ACTT), Controlled Word Association Test (CWAT), Rey Auditory Verbal Learning Test (RAVLT), Digit Span Test (DST). And then, two patient groups of OCD patients (patients with autogenous obsessions and patients with reactive obsessions) were compared in terms of the scores of same tests, with a hypothesis that claims, cognitive functions of patients with autogenous obsessions, who shown schizotypal personality features and thought disorder in higher ratio, will show more impairment than cognitive functions of patients with reactive obsessions. Significant impairment was found in OCD patients in terms of Stroop test and WCST scores when compared to scores of healthy controls. There was no difference pointed out between cognitive functions of patients with autogenous obsessions and reactive obsessions. Due to limited number of patients with autogenous obsessions in current study, any future research with greater sample size will be helpful to explain the cognitive functions in OCD with autogenous and reactive obsessions. (C) 2014 Elsevier Inc. All rights reserved.