Depression in older adults is common. Depressive symptoms may be part of a recurrent depressive disorder or experienced for the first time in later life as a result of changes in risk and resilience factors. There is an association between cerebrovascular pathology, vascular risk factors and depression. Physical illnesses, particularly those associated with frailty, are also important risk factors for depression. Depression has a distinct presentation in late life and low mood may not be the predominant presenting symptom. Older patients may present with physical symptoms, apathy, cognitive symptoms, agitation, retardation, fatigue or weight loss.