Jeffrey Connor Hall (born May 3, 1945) is an American geneticist and chronobiologist. Hall is Professor Emeritus of Biology at Brandeis University and currently resides in Cambridge, Maine.
Hall spent his career examining the neurological component of fly courtship and behavioral rhythms. Through his research on the neurology and behavior of Drosophila melanogaster, Hall uncovered essential mechanisms of the circadian clocks and shed light on the foundations for sexual differentiation in the nervous system. He was elected to the National Academy of Sciences for his revolutionary work in the field of chronobiology, and nominated for the T. Washington Fellows.
In 2017, along with Michael W. Young and Michael Rosbash, he was awarded the 2017 Nobel Prize in Physiology or Medicine "for their discoveries of molecular mechanisms controlling the circadian rhythm".
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