Depression is the most common mental illness in the elderly, with an estimated 15% of the elderly population living in the community having clinically significant depressive symptoms. It is of medical and social importance as it is associated with increased morbidity and mortality, poor quality of life and increased social dependence. Recognition of depression in this age group has been found to be poor, with more patients presenting with somatic physical symptoms. Treatment can also be difficult compared with younger patients, with increased prevalence of side effects of medication, polypharmacy and poor compliance. Primary care practitioners are therefore crucial in the detection and early instigation of appropriate treatment. This article looks at the risk factors, presentation and treatment options for depression in the elderly age group.