Sleep dysfunction is a prominent feature in the subjective experience of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS). Although studies using polysomonography have identified at least one abnormal sleep characteristic in individuals with ME/CFS, no standard abnormalities in sleep have been identified. At the time of writing, only one published study had compared actigraphic measures of sleep between ME/CFS and controls, with no differences found. The aim of this study was to compare sleep parameters in people with and without ME/CFS using self-report and actigraphy.