Narcolepsy is not a common disorder, with best estimates finding it affects only about 0.025-0.05% of the population. Nonetheless, it is a vital disorder for school psychologists to be familiar with on the basis that its symptoms frequently first occur during childhood and adolescence. If undiagnosed, this disorder causes significant distress and disadvantage to the student as well as frustration and difficulty for school staff. It is surprising that narcolepsy has received almost no attention in the school psychology literature. This article provides school psychologists with an overview of the central features, causes, diagnosis and treatment of narcolepsy in young people. It then outlines school management of the disorder, with specific consideration of the role of the school psychologist.