The aim of this study was to explore the demographic characteristics and the diagnostic profile of geriatric patients attending the Psychiatry and Neurology outpatient clinics of a tertiary hospital. This cross-sectional study was conducted in the combined outpatient clinics of Neurology and Psychiatry of King Fahd Hospital from June 2007 to December 2011. The inclusion criteria were those aged ≥60 years after obtaining an informed consent. The majority of the sample were illiterate (95.5%) with difficulties in communication, so interviewing the caregivers was mandatory in most of the domains examined. In conclusion, psychiatric disorders are common among older persons attending a tertiary care setting in Saudi ArabiPrimary care physicians in this region must be particularly trained to detect the psychiatric disorders among older adults with attention given to anxiety disorders, given their prevalence, medical and psychiatric comorbidity. Similar studies as well as epidemiological investigations, are important to raise awareness toward the different types of psychiatric disorders encountered among older adults in Saudi Arabia enabling the development of more specific prevention strategies and proper management.