Nocturia is defined as the complaint that the individual has to wake at night to urinate. In older persons, this urinary functional disorder is most often of multifactorial origin and/or the symptom (sometimes the unique one) of a chronic disease. Nocturia is very annoying and its impact on health and quality of life is related to the disturbance of sleep cycles. In aged patients, who are often polymorbide and polymedicated, the interaction between nocturia and geriatric syndromes as well as comorbidities has to be more particularly underlined. The impact on informal caregiver's health and the decision for institutional admission are also to be considered. An adapted management of nocturia improves quality of life and reduces morbidity in aged patients.