An entire chapter in the DSM-5 is devoted to depressive disorders. Depressive disorders are among the most frequently diagnosed mental disorders that clinicians are likely to encounter in their practice. However, not only the underlying causes and presenting symptoms but the duration and pervasiveness of the illness and degree of impairment vary greatly. All depressive disorders are characterized by the presence of a sad, empty, or irritable mood with accompanying cognitive and somatic changes that can significantly impair level of functioning. What distinguishes one disorder from another is primarily the duration, timing, and presumed etiology. This course will discuss new diagnoses in depressive disorders found in the DSM-5 as well as both descriptions of and distinguishing criteria for different types of depressive disorders.