Many patients with epilepsy also have associated cognitive impairment which is very important in determining their quality of life. In this study, 100 patients with epilepsy were assessed for various modalities of cognitive function and their performance was scored. These scores were compared against those of a control population to determine the prevalence and severity of the condition. The prevalence was 74% for Memory impairment, 82% for executive dysfunction, 63% for constructional ability impairment, 58% for impaired calculation ability, 20% for right to left confusion and 14% for finger anomia. All the modalities except constructional praxis worsened with longer duration of the disease and with poorer seizure control. Patients on Sodium valproate had the least degree of memory and executive dysfunction. Patients with focal seizure semiologies had the most degree of executive dysfunction