Sleep disturbance commonly co-occurs with a range of psychiatric disorders. This is of concern given the accruing evidence that sleep is critically important for mood regulation, physical health, cognitive functioning, and quality of life. There is strong evidence that insomnia, even if it is comorbid with another psychiatric disorder, is treatable with cognitive behavioral therapy. There is a need to develop cognitive behavioral approaches to the other types of sleep disturbance often experienced by patients with psychiatric disorders, such as hypersomnia, reduced sleep need, delayed phase, nocturnal panic attacks, and nightmares. The possibility of developing a transdiagnostic treatment that comprehensively treats sleep disturbance for use across psychiatric disorders is discussed because (a) there are many disorders in which multiple types of sleep disturbance can be characteristic at one time or over the life-course of the disorder and (b) there are considerable challenges inherent to disseminating any new treatments but particularly many “disorder-specific” treatments.