Depression in the older adult is frequently under-diagnosed and under-treated in the health care setting resulting in increased mortality in the elderly. When the Geriatric Depression Scale (GDS) is administered in combination with other diagnostic evaluations, however, it provides a reliable, valid, and cost-effective depression screening for the elderly. This paper provides psychometric evidence of the efficacy of the GDS, outlines the magnitude of the problems faced among healthcare professionals in assessing depression in the elderly, and encourages the incorporation of the GDS in standard assessment procedures of the older adult.