Sleep-related dissociative disorders, a variant of dissociative disorders, are parasomnias that can emerge at any point during sleep period, either at transition from wakefulness to sleep or within several minutes after awakening from stages 1 or 2 non-rapid eye movement (NREM) sleep or REM sleep. Patient's clinical features may support a specific dissociative disorder subtype diagnosis associated with sleep-related episodes, specifically dissociative identity disorder, dissociative fugue, or dissociative disorder NOS. With any form of sleep-related dissociative disorder, onset can be gradual and sporadic in nature. Females are reported to be affected predominantly, and onset can range from childhood to midlife. Sexualized and frankly sexual behaviors can emerge with sleep-related dissociative disorders. There are several potential considerations for differential diagnosis of sleep-related dissociative disorders, including an NREM arousal disorder parasomnia, parasomnia associated with REM sleep, or nocturnal seizures.