Barbara E. Jones FRSC (Dec 19, 1944 - July 22, 2022) was an American-Canadian neuroscientist whose research concerns the chemical and neurological basis for the circadian alternation between sleep and wakefulness. Jones has been described as "a central contributor to our understanding of the brain basis of REM sleep".[1] She was a professor emerita in the McGill University Department of Neurology and Neurosurgery, associated with the Montreal Neurological Institute and Hospital.[2]